- Article
After you've installed Exchange Server 2016 or Exchange 2019 in your organization, you need to configure Exchange for mail flow and client access. Without these additional steps, you won't be able to send mail to the internet and external clients (for example, Microsoft Outlook, and Exchange ActiveSync devices) won't be able to connect to your Exchange organization.
The steps in this topic assume a basic Exchange deployment with a single Active Directory site and a single simple mail transport protocol (SMTP) namespace.
Important
This topic uses example values such as Mailbox01, contoso.com, mail.contoso.com, and 172.16.10.11. Replace the example values with the server names, FQDNs, and IP addresses for your organization.
For additional management tasks related to mail flow and clients and devices, see Mail flow and the transport pipeline and Clients and mobile.
What do you need to know before you begin?
Estimated time to complete this task: 50 minutes
You might receive certificate warnings when you connect to the Exchange admin center (EAC) website until you configure a secure sockets layer (SSL) certificate on the Mailbox server. You'll be shown how to do this later in this topic.
To open the EAC, see Exchange admin center in Exchange Server. To open the Exchange Management Shell, see Open the Exchange Management Shell.
For information about keyboard shortcuts that may apply to the procedures in this topic, see Keyboard shortcuts in the Exchange admin center.
Tip
Having problems? Ask for help in the Exchange forums. Visit the forums at: Exchange Server, Exchange Online, or Exchange Online Protection.
Step 1: Create an internet Send connector
Before you can send mail to the internet, you need to create a Send connector on the Mailbox server. For instructions, see Create a Send connector in Exchange Server to send mail to the internet.
Note
By default, a Receive connector named "Default Frontend <ServerName>_" is created when Exchange is installed. This Receive connector accepts anonymous SMTP connections from external servers. You don't need to do any additional configuration if this is the functionality you want. If you want to restrict inbound connections from external servers, modify the Default Frontend <Mailbox server> Receive connector on the Mailbox server. For more information, see Default Receive connectors created during setup.
Step 2: Add additional accepted domains
By default, Exchange uses the Active Directory domain where Setup /PrepareAD was run for email addresses. If you want recipients to receive and send messages to and from another domain, you need to add the domain as an accepted domain. For instructions, see Create accepted domains and Configure Exchange to accept mail for multiple authoritative domains.
Important
To receive email from the internet for a domain, you need an MX resource record in your public DNS for that domain. Each MX record should resolve to the internet-facing server that receives email for your organization.
Step 3: Configure the default email address policy
You need to be assigned permissions before you can perform this procedure or procedures. To see what permissions you need, see the "Email address policies" entry in the Email address and address book permissions topic.
If you added an accepted domain in the previous step and you want that domain to be added to every recipient in the organization, you need to update the default email address policy. For instructions, see Modify email address policies and Apply email address policies to recipients.
Note
We recommend that you configure a user principal name (UPN) that matches the primary email address of each user. If you don't provide a UPN that matches the email address of a user, the user will be required to manually provide their domain\username or UPN in addition to their email address. If their UPN matches their email address, Outlook on the web (formerly known as Outlook on the web), ActiveSync, and Outlook will automatically match their email address to their UPN.
Step 4: Configure external URLs
You need to be assigned permissions before you can perform this procedure or procedures. To see what permissions you need, see the " <Service> virtual directory settings" entry in the Clients and mobile devices permissions topic.
Before clients can connect to your new server from the internet, you need to configure the external domains (or URLs) on the virtual directories in the Client Access (frontend) services on the Mailbox server and then in your public DNS records. The steps below configure the same external domain on the external URL of each virtual directory. If you want to configure different external domains on one or more virtual directory external URLs, you need to configure the external URLs manually. For more information, see Default settings for Exchange virtual directories.
Open the EAC and go to Servers > Servers, select your internet-facing Mailbox server that your clients will connect to, and then click Edit
.In the Exchange server properties window that opens, select the Outlook Anywhere tab, configure the following settings:
Specify the external host name...: Enter the externally accessible FQDN that your external clients will use to connect to their mailboxes (for example, mail.contoso.com).
Specify the internal host name...: Enter the internally accessible FQDN (for example, mail.contoso.com).
When you're finished, click Save.
Go to Servers > Virtual directories and then select Configure external access domain
.In the Configure external access domain window opens, configure the following settings:
Select the Mailbox servers to use with the external URL: Click Add
In the Select a server dialog that opens, select the Mailbox server you want to configure and then click Add. After you've added all of the Mailbox servers that you want to configure, click OK.
Enter the domain name you will use with your external Mailbox servers: Enter the external domain that you want to apply (for example, mail.contoso.com). When you're finished, click Save.
.
.
Some organizations use a unique Outlook on the web FQDN to protect against future changes to the underlying server FQDN. Many organizations use owa.contoso.com for their Outlook on the web FQDN instead of mail.contoso.com. If you want to configure a unique Outlook on the web FQDN, do the following steps. This checklist assumes you have configured a unique Outlook on the web FQDN.
Back at Servers > Virtual directories, select owa (Default Web Site) on the server that you want to configure, and then click Edit
.The owa (Default web site) window opens. On the General tab in the External URL field, enter the following information:
https://The unique Outlook on the web FQDN you want to use (for example, owa.contoso.com), and then append /owa. For example, https://owa.contoso.com/owa.
/owa
In this example, the final value would be https://owa.contoso.com/owa
When you're finished, click Save.
Back at Servers > Virtual directories, select ecp (Default Web Site) on the server that you want to configure, and click Edit
.In the ecp (Default web site) window that opens, enter the same URL from the previous step, but append the value /ecp instead of /owa (for example, https://owa.contoso.com/ecp). When you're finished, click Save.
After you've configured the external URL in the Client Access services virtual directories on the Mailbox server, you need to configure your public DNS records for Autodiscover, Outlook on the web, and mail flow. The public DNS records should point to the external IP address or FQDN of your internet-facing Mailbox server and use the externally accessible FQDNs that you've configured on your Mailbox server. The recommended DNS records that you should create to enable mail flow and external client connectivity are described in the following table:
| FQDN | DNS record type | Value |
|---|---|---|
| Contoso.com | MX | Mail.contoso.com |
| Mail.contoso.com | A | 172.16.10.11 |
| Owa.contoso.com | CNAME | Mail.contoso.com |
| Autodiscover.contoso.com | CNAME | Mail.contoso.com |
How do you know this step worked?
To verify that you've successfully configured the external URLs in the Client Access services virtual directories on the Mailbox server, do the following steps:
In the EAC, go to Servers > Virtual directories.
In the Select server field, select the internet-facing Mailbox server.
Select a virtual directory and then, in the virtual directory details pane, verify that the External URL field is populated with the correct FQDN and service as shown in the following table:
Virtual directory External URL value Autodiscover No external URL displayed ECP https://owa.contoso.com/ecp EWS https://mail.contoso.com/EWS/Exchange.asmx Microsoft-Server-ActiveSync https://mail.contoso.com/Microsoft-Server-ActiveSync OAB https://mail.contoso.com/OAB OWA https://owa.contoso.com/owa PowerShell http://mail.contoso.com/PowerShell
To verify that you've successfully configured your public DNS records, do the following steps:
Open a command prompt and run
nslookup.exe.Change to a DNS server that can query your public DNS zone.
In
nslookup, look up the record of each FQDN you created. Verify that the value that's returned for each FQDN is correct.In
nslookup, typeset type=mxand then look up the accepted domain you added in Step 1. Verify that the value returned matches the FQDN of the Mailbox server.
Step 5: Configure internal URLs
You need to be assigned permissions before you can perform this procedure or procedures. To see what permissions you need, see the " <Service> virtual directory settings" entry in the Clients and mobile devices permissions topic.
Before clients can connect to your new server from your internal network, you need to configure the internal domains (or URLs) on the virtual directories in the Client Access (frontend) services on the Mailbox server and then in your internal DNS records.
The procedure below lets you choose whether you want users to use the same URL on your intranet and on the internet to access your Exchange server or whether they should use a different URL. What you choose depends on the addressing scheme you have in place already or that you want to implement. If you're implementing a new addressing scheme, we recommend that you use the same URL for both internal and external URLs. Using the same URL makes it easier for users to access your Exchange server because they only have to remember one address.
Regardless of your decision, you need to configure a private DNS zone for the address space you choose. For more information about administering DNS zones, see Administering DNS Server.
For more information about internal and external URLs on virtual directories, see Default settings for Exchange virtual directories Virtual Directory Management.
Configure internal and external URLs to be the same
Open the Exchange Management Shell on your Mailbox server.
Store the host name of your Mailbox server in a variable that will be used in the next step. For example, Mailbox01.
$HostName = "Mailbox01"Run each of the following commands in the Exchange Management Shell to configure each internal URL to match the virtual directory's external URL.
Set-EcpVirtualDirectory "$HostName\ECP (Default Web Site)" -InternalUrl ((Get-EcpVirtualDirectory "$HostName\ECP (Default Web Site)").ExternalUrl)Set-WebServicesVirtualDirectory "$HostName\EWS (Default Web Site)" -InternalUrl ((Get-WebServicesVirtualDirectory "$HostName\EWS (Default Web Site)").ExternalUrl)Set-ActiveSyncVirtualDirectory "$HostName\Microsoft-Server-ActiveSync (Default Web Site)" -InternalUrl ((Get-ActiveSyncVirtualDirectory "$HostName\Microsoft-Server-ActiveSync (Default Web Site)").ExternalUrl)Set-OabVirtualDirectory "$HostName\OAB (Default Web Site)" -InternalUrl ((Get-OabVirtualDirectory "$HostName\OAB (Default Web Site)").ExternalUrl)Set-OwaVirtualDirectory "$HostName\OWA (Default Web Site)" -InternalUrl ((Get-OwaVirtualDirectory "$HostName\OWA (Default Web Site)").ExternalUrl)Set-PowerShellVirtualDirectory "$HostName\PowerShell (Default Web Site)" -InternalUrl ((Get-PowerShellVirtualDirectory "$HostName\PowerShell (Default Web Site)").ExternalUrl)
After you've configured the internal URL on the Mailbox server virtual directories, you need to configure your private DNS records for Outlook on the web and other connectivity. Depending on your configuration, you'll need to configure your private DNS records to point to the internal or external IP address or FQDN of your Mailbox server. Examples of recommended DNS records that you should create are described in the following table:
| FQDN | DNS record type | Value |
|---|---|---|
| Mail.contoso.com | CNAME | Mailbox01.corp.contoso.com |
| Owa.contoso.com | CNAME | Mailbox01.corp.contoso.com |
How do you know this step worked?
To verify that you've successfully configured the internal URL on the Mailbox server virtual directories, do the following:
In the EAC, go to Servers > Virtual directories.
In the Select server field, select the internet-facing Mailbox server.
Select a virtual directory and then click Edit
.Verify that the Internal URL field is populated with the correct FQDN and service as shown in the following table:
Virtual directory Internal URL value Autodiscover No internal URL displayed ECP https://owa.contoso.com/ecp EWS https://mail.contoso.com/EWS/Exchange.asmx Microsoft-Server-ActiveSync https://mail.contoso.com/Microsoft-Server-ActiveSync OAB https://mail.contoso.com/OAB OWA https://owa.contoso.com/owa PowerShell http://mail.contoso.com/PowerShell
To verify that you have successfully configured your private DNS records, do the following:
Open a command prompt and run
nslookup.exe.Change to a DNS server that can query your private DNS zone.
In
nslookup, look up the record of each FQDN you created. Verify that the value that's returned for each FQDN is correct.
Configure different internal and external URLs
Open the EAC, and go to Servers > Virtual directories,
On the internet-facing Mailbox server, select the virtual directory that you want to configure, and then click Edit
.The virtual directory properties window opens. In the Internal URL field, replace the existing host name value in the URL (likely, the FQDN of the Mailbox server) with the new value that you want to use (for example, internal.contoso.com).
For example, in the properties of the Exchange Web Services (EWS) virtual directory, change the existing value from https://Mailbox01.corp.contoso.com/ews/exchange.asmx to https://internal.contoso.com/ews/exchange.asmx.
When you're finished, click Save.
Repeat the previous steps for each virtual directory you want to change.
Note
The ECP and OWA virtual directory internal URLs must be the same. You can't set an internal URL on the Autodiscover virtual directory.
After you've configured the internal URL on the Mailbox server virtual directories, you need to configure your private DNS records for Outlook on the web, and other connectivity. Depending on your configuration, you'll need to configure your private DNS records to point to the internal or external IP address or FQDN of your Mailbox server. An example of the recommended DNS record that you should create is described in the following table:
| FQDN | DNS record type | Value |
|---|---|---|
| internal.contoso.com | CNAME | Mailbox01.corp.contoso.com |
How do you know this step worked?
To verify that you've successfully configured the internal URLs in the Client Access services virtual directories on the Mailbox server, do the following steps:
In the EAC, go to Servers > Virtual directories.
In the Select server field, select the internet-facing Mailbox server.
Select a virtual directory and then click Edit
.Verify that the Internal URL field is populated with the correct FQDN. For example, you may have set the internal URLs to use internal.contoso.com.
Virtual directory Internal URL value Autodiscover No internal URL displayed ECP https://internal.contoso.com/ecp EWS https://internal.contoso.com/EWS/Exchange.asmx Microsoft-Server-ActiveSync https://internal.contoso.com/Microsoft-Server-ActiveSync OAB https://internal.contoso.com/OAB OWA https://internal.contoso.com/owa PowerShell http://internal.contoso.com/PowerShell
To verify that you've successfully configured your private DNS records, do the following:
Open a command prompt and run
nslookup.exe.Change to a DNS server that can query your private DNS zone.
In
nslookup, look up the record of each FQDN you created. Verify that the value that's returned for each FQDN is correct.
Step 6: Configure an SSL certificate
Some services, such as Outlook Anywhere and Exchange ActiveSync, require certificates to be configured on your Exchange server. The following steps show you how to configure an SSL certificate from a third-party certificate authority (CA):
Create an Exchange Server certificate request for a certification authority.
You should request a certificate from a third-party CA so your clients automatically trust the certificate. For more information, see Best practices for Exchange certificates.
If you configured your internal and external URLs to be the same, Outlook on the web (when accessed from the internet) and Outlook on the web (when accessed from the Intranet) should both show owa.contoso.com. OAB (when accessed from the internet) and OAB (when accessed from the Intranet) should show mail.contoso.com.
If you configured the internal URLs to be internal.contoso.com, Outlook on the web (when accessed from the internet) should show owa.contoso.com and Outlook on the web (when accessed from the Intranet) should show internal.contoso.com.
Complete a pending Exchange Server certificate request.
Assign certificates to Exchange Server services
At minimum, you should select SMTP and IIS.
If you receive the warning Overwrite the existing default SMTP certificate?, click Yes.
How do you know this step worked?
To verify that you've successfully added a new certificate, do the following steps:
In the EAC, go to Servers > Certificates.
Select the new certificate and then, in the certificate details pane, verify that the following are true:
Status shows Valid
Assigned to services shows, at minimum, IIS and SMTP.
How do you know this task worked?
To verify that you've configured mail flow and external client access, do the following steps:
In Outlook, on an Exchange ActiveSync device, or on both, create a new profile. Verify that Outlook or the mobile device successfully creates the new profile.
In Outlook, or on the mobile device, send a new message to an external recipient. Verify the external recipient receives the message.
In the external recipient's mailbox, reply to the message you just sent from the Exchange mailbox. Verify the Exchange mailbox receives the message.
Go to https://owa.contoso.com/owa and verify that there are no certificate warnings.
FAQs
What is mail flow in Exchange Server? ›
In Exchange Server, mail flow occurs through the transport pipeline. The transport pipeline is a collection of services, connections, components, and queues that work together to route all messages to the categorizer in the Transport service on an Exchange Mailbox server inside the organization.
How to configure Exchange mail server? ›- Step 1: Create an internet Send connector. ...
- Step 2: Add additional accepted domains. ...
- Step 3: Configure the default email address policy. ...
- Step 4: Configure external URLs. ...
- Step 5: Configure internal URLs. ...
- Step 6: Configure an SSL certificate.
| Purpose | Ports | Source |
|---|---|---|
| Outbound mail | 25/TCP (SMTP) | Mailbox server |
| Outbound mail (if proxied through the Front End transport service) | 25/TCP (SMTP) | Mailbox server |
| DNS for name resolution of the next mail hop (not pictured) | 53/UDP,53/TCP (DNS) | Mailbox server |
Use the Test-Mailflow cmdlet to diagnose whether mail can be successfully sent from and delivered to the system mailbox on a Mailbox server.
How do I setup mail flow in Office 365? ›- Configure your Microsoft 365 or Office 365 environment.
- Set up a connector from Office 365 to your email server.
- Change your MX record to redirect your mail flow from the internet to Microsoft 365 or Office 365.
- Open the Microsoft 365 admin center and go to Users > Active users.
- Select the user, and in the flyout that appears, click Mail.
- In the Email apps section, click Manage email apps.
- Verify the Authenticated SMTP setting: unchecked = disabled, checked = enabled.
Find your Exchange mailbox server settings
In Outlook Web App, on the toolbar, select Settings. > Mail > POP and IMAP. The POP3, IMAP4, and SMTP server name and other settings you may need to enter are listed on the POP and IMAP settings page.
...
Configuring SMTP and POP3 for Exchange Online (Office 365)
| Protocol | Server name | Port |
|---|---|---|
| SMTP | smtp.office365.com | 587 |
| POP3 | outlook.office365.com | 995 |
What are the different email protocols? The common protocols for email delivery are Post Office Protocol (POP), Internet Message Access Protocol (IMAP), and Simple Mail Transfer Protocol (SMTP). Each of these protocols has a standard methodology to deal with the emails and also has defined functions.
What ports are needed for Exchange Server? ›The Microsoft Exchange Routing Engine (RESvc) listens for routing link state information on TCP port 691. Exchange uses routing link state information to route messages and the routing table is constantly updated. TCP port 102 is the port that the Exchange message transfer agent (MTA) uses to communicate with other X.
Which protocol is used to client server Exchange messages? ›
Clients typically communicate with servers by using the TCP/IP protocol suite. TCP is a connection-oriented protocol, which means the protocol establishes and maintains connections until the application programs at each end have finished exchanging messages.
How email flow happens from server to user? ›The receiving server accepts the message so that it can be delivered to the recipient. The recipient's email client retrieves the message using standards like the Post Office Protocol (POP) or Internet Message Access Protocol (IMAP) to download the message so it can be read.
How do I know if my Outlook is on an Exchange Server? ›How can I tell if I have a Microsoft Exchange Server account? Click the File tab. Click Account Settings, and then click Account Settings. On the E-mail tab, the list of accounts indicates the type of each account.
What is the difference between email flow and email sequence? ›Sequences sends a series of email templates to contacts. When creating sequences, you are using sales email templates. Workflows send marketing emails, which do not use the same templates.
How do I manage mail flow settings email forwarding? ›Under Mailbox settings > Mail flow settings, click the Manage mail flow settings link. In the Manage mail flow settings display pane, you will see the Email forwarding option. Click the Edit button next to this option to view or change the setting for forwarding email messages.
How do I manage mailboxes in Exchange Server? ›- Click. Add email address type to add a new email address for this mailbox. Select one of following address types: SMTP: This is the default address type. Click this button and then type the new SMTP address in the * Email address box. ...
- Click OK.
- Click Save.
With Microsoft Exchange Server you, (or your IT support company), are in full control of the hardware and infrastructure, whereas with Office 365 you do not have direct access to this. The difference can impact on the level of control you have over configuration, upgrades and system changes.
Where is mail flow in Office 365 admin? ›To go directly to the mail flow reports, open https://admin.exchange.microsoft.com/#/reports/mailflowreportsmain.
How do I fix email not connecting to server? ›- Ensure that the email server does not have any restrictions that may prevent a client from connecting to the server.
- Ensure that the email client has the necessary connectivity via the recommended ports.
- Ensure that all the settings on the mail client are correct.
- From the Tools menu, select Accounts.
- Under Mail highlight your E-mail account and click Properties.
- Click the Servers tab and make sure that "My outgoing server (SMTP) requires authentication" is checked.
- Click the Advanced tab, change the outgoing server port: 465 or 587 for SSL.
- Click OK.
Is Exchange Server POP or IMAP? ›
By default, POP3 and IMAP4 are enabled for all users in Exchange Online. To enable or disable POP3 and IMAP4 for individual users, see Enable or Disable POP3 or IMAP4 access for a user. To customize the POP3 or IMAP4 settings for a user, see Set POP3 or IMAP4 settings for a user.
How do I enable email in Exchange? ›- In the EAC, navigate to Recipients > Mailboxes.
- Click More. , and then click Connect a mailbox. ...
- Click the disabled mailbox that you want to reconnect, and then click Connect.
- In the window that asks if you're sure that you want to reconnect the mailbox, click Yes.
Exchange is a Microsoft protocol, which offers all the same function as IMAP with additional power to sync tasks, contacts and calendars with co-workers, and view them from any device. Exchange is an ideal solution for professionals who depend heavily on collaboration and often work remotely.
What is the difference between Exchange Server and SMTP server? ›Exchange Server primarily uses a proprietary protocol called MAPI to talk to email clients, but subsequently added support for POP3, IMAP, and EAS. The standard SMTP protocol is used to communicate to other Internet mail servers. Exchange Server is licensed both as on-premises software and software as a service (SaaS).
What are the two main ways an email client connects to the mail server? ›There are two primary protocols used by email client applications to retrieve email from mail servers: the Post Office Protocol (POP) and the Internet Message Access Protocol (IMAP).
How do I send an email without SMTP? ›The simplest way to send a message is to use QuickSend method of Smtp class (this method is static, it does not require you to create an instance of Smtp class). QuickSend method allows you to send e-mails out even if you do not have an SMTP relay server.
What is 3 way handshake in SMTP? ›Establish a connection - In TCP, this is called the three-way handshake where each server exchanges synchronization (SYN) and acknowledgment (ACK). The required command is HELO (or EHLO for Extended SMTP supporting images, video and other languages).
Does Exchange Server need Internet access? ›You can configure exchange servers without internet access.
What are Exchange Server types? ›Exchange Server license types
The Server license is sold in two server editions: Standard Edition and Enterprise Edition. Client Access licenses (CALs): Exchange also comes in two CAL editions, which are referred to as a Standard CAL and an Enterprise CAL.
Whereas port 25 is the recommended port number for SMTP communications between mail servers (i.e., for relaying messages), port 587 is the one recommended for message submissions by mail clients to mail servers.
How do clients and servers exchange messages via HTTP? ›
Through the HTTP protocol, resources are exchanged between client devices and servers over the internet. Client devices send requests to servers for the resources needed to load a web page; the servers send responses back to the client to fulfill the requests.
Which protocol is used for client access? ›World Wide Web Service. Remote procedure call (RPC) over Hypertext Transfer Protocol (HTTP) Proxy Windows networking component (required only if you are deploying clients that will use the Outlook Anywhere functionality, previously called RPC over HTTP)
What is standard client-server protocols? ›TCP/IP is the standard network protocol for client/server applications.
How does request flow from client to server? ›In client-server architecture, client makes a request to the server, and server hosts / delivers and manages the response, and returns it to the client. In easier terms, client requests for resources (typing the URL in browser) the server, fetches resource from database and returns the response.
How does an email client communicate with email servers? ›The email client is usually set up automatically to connect to the user's mail server, which is typically either an MSA or an MTA, two variations of the SMTP protocol. The email client which uses the SMTP protocol creates an authentication extension, which the mail server uses to authenticate the sender.
Which allows users to access their emails from the email server? ›IMAP (Internet Message Access Protocol) enables users to manage their emails on the email server directly.
What is the difference between Outlook and Exchange server? ›Exchange is a mail server, which means it's a dedicated network resource management program. Outlook is an email client, which means it's a software program installed on your desktop that is designed to send and receive emails.
How does Outlook communicate with Exchange server? ›The Exchange server includes an Endpoint Mapper (EPM) that listens on TCP port 135. The Outlook client connects to this port and is assigned random TCP server ports to communicate with the Exchange server using the MAPI protocol.
How does Exchange server work with Outlook? ›When you use an Exchange account, your email messages are delivered to and saved in your mailbox on the Exchange server. Your contacts and calendar are saved there, too. When your business or school sets up their Exchange server, they choose what method your Exchange account uses to access email on the server.
Where is mail flow in Office 365? ›Locating the Mailflow report in the Exchange Admin Center
These reports can be found at this path: Exchange Admin Center > Reports > Mail Flow.
What is mail flow rule for domain? ›
Mail Flow Rules (formerly known as Transport Rules in on-premises Exchange) are rules that are applied on an email domain that can identify and perform actions on emails that flow in and out of an organization.
What are mail flow connectors Office 365? ›Connectors are a collection of instructions that customize the way your email flows to and from your Microsoft 365 or Office 365 organization. Actually, most Microsoft 365 and Office 365 organizations don't need connectors for regular mail flow. This article describes the mail flow scenarios that require connectors.
What are accepted domains in mail flow? ›Accepted domains are the SMTP name spaces (also known as address spaces) that you configure in an Exchange organization to receive email messages. You use the Exchange admin center (EAC) or the Exchange Management Shell to configure accepted domains in Exchange Server.
How do I troubleshoot mail flow in Office 365? ›To validate and troubleshoot mail flow from Microsoft 365 or Office 365 to the email servers in your on-premises organization (also called the on-premises server), validate your connectors. You can set up and validate connectors on the Connectors page in the Exchange admin center (EAC).
Where is mail flow in Office 365 admin center? ›To go directly to the mail flow reports, open https://admin.exchange.microsoft.com/#/reports/mailflowreportsmain.
How do I enable mail flow rule? ›1- Login to your Office 365 Admin portal and go to Exchange administration. 2- Go into the “Mail Flow” section. 3- Click the add button and select the option to create a new rule.
What is the rule of 5 in emails? ›Less is more in email, and making no more than five quick points in five short sentences or paragraphs is more digestible. Shorter emails tend to be those your recipients can respond to more quickly as well. Nothing is worse than an email message that is ignored.
What is the difference between Exchange server and Office 365? ›With Microsoft Exchange Server you, (or your IT support company), are in full control of the hardware and infrastructure, whereas with Office 365 you do not have direct access to this. The difference can impact on the level of control you have over configuration, upgrades and system changes.
What is the SMTP for Microsoft Exchange? ›...
How to set up SMTP AUTH client submission.
| Device or Application setting | Value |
|---|---|
| Server/smart host | smtp.office365.com |
| Port | Port 587 (recommended) or port 25 |
When you use an Exchange account, your email messages are delivered to and saved in your mailbox on the Exchange server. Your contacts and calendar are saved there, too. When your business or school sets up their Exchange server, they choose what method your Exchange account uses to access email on the server.
What is the default domain in exchange? ›
By default, when you install the first Exchange Mailbox server, the fully qualified domain name (FQDN) of your forest root domain in Active Directory is configured as an authoritative domain. If you don't want to use this domain for email, you need to add another authoritative domain.
What is the difference between domain and email domain? ›For example, all the internet pages associated with our business start with “www.mail.com/”. You can tell the difference between an email domain and a website because they are formatted differently: web addresses always start with www. and email addresses always contain an @ sign before the domain.
What types of domains are there in exchange? ›Ever since Exchange 2007, we've had this concept of accepted domains in our Exchange organizations and there can be three types: authoritative, internal relay, and external relay.