How to Set up the SMTP Server For Office 365

Set up secure and reliable email transmission

6 min. read

Published onFebruary 26, 2024

published onFebruary 26, 2024

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A Simple Mail Transfer Protocol (SMTP) server for Office 365 is crucial for organizations that wish to secure their outgoing emails. Not only is it reliable but integrates with the Office suite apps making it a no-brainer to configure it.

How do I enable SMTP in Microsoft 365?

1. Set up a static IP address

Aside from providing a consistent address, using a static IP makes it easier to create firewall policies that enhance network security because you can now manage traffic from both sides.

2. Enable TLS 1.2

2.1 Check status

2.2 Check TLS version

2.3 Enable TLS

2.3.1 Enable TLS via the Registry

TLS 1.2 is the preferred security protocol for email servers because it is widely adopted by most email clients and has strong encryption properties compared to older versions.

3. Unblock port 587

Port 587 or 25 is the default port for outgoing email traffic. Most ISPs block this port but if you enable TLS 1.2, you’ll require this port for email transmission to further enhance your security. It will also help avoid being blacklisted on email inboxes as spam since the port will now be free from restrictions.

4. Set up SMTP server

4.1 Set up via domain

4.2 Set up for individual accounts

Potential issues and best practices for SMPT server for Office 365

YourTLS certificate may expirewhile you’ve enabled SMTP authentication. A quick update of your system should fix this since most are meant to be compatible with certain OS versions.

In case theemails end up in the spam folder, review your spam filtering settings or whitelist the specific sender/domain.

For best practices,SMTP port problemscan occur at any time so check your firewall and network configurations frequently to ensure it is notblocking any connectionsand all necessary ports remain open.

That’s all we had for this article. If you’ve enabled an SMTP server on your Office 365, we’d like you to share your experience thus far. Drop us a comment down below.

How to Set up the SMTP Server For Office 365#

How do I enable SMTP in Microsoft 365?#

1. Set up a static IP address#

2. Enable TLS 1.2#

3. Unblock port 587#

4. Set up SMTP server#

Potential issues and best practices for SMPT server for Office 365#