Sending emails from Onswim using Microsoft 365 (Office 365)

What Are the Microsoft 365 / Office 365 SMTP Settings?

If you’re in a hurry, let’s jump right into the Office 365 SMTP settings:

SMTP Server: smtp.office365.com
Port: 587
Requires SSL: Yes
Requires TLS: Yes (if available)
Authentication: Yes (choose Login if multiple options available)
Username: Your full Microsoft 365 email address (e.g. name@yourdomain.com)
Password: The password associated with your Microsoft 365 email address. You or your Microsoft 365 admin entered this password when creating the email account.

Note – if you’re having issues using these SMTP details, you might need to enable SMTP authentication in your Microsoft 365 admin. We’ll show you how to do that later in this article. Commonly you will see an "Upload error" message in Onswim if your SMTP details are incorrect or disabled in your Microsoft 365 account.

How Do I Use Office 365 As SMTP?

By default, Microsoft 365 disables SMTP authentication (SMTP AUTH). However, you can easily enable it with just a few clicks from your Microsoft 365 admin center. We’ll show you how to do this in detail in the next section.

Once you enable SMTP AUTH client submission, you can set up email sending by entering the SMTP server details from above.

1. Enable SMTP Authentication in Microsoft 365

In order to send your Onswim site’s emails via your Microsoft 365 email address, you’ll first need to enable SMTP authentication for that email address in your Microsoft 365 admin center. Otherwise, Microsoft 365 will block requests to the SMTP server.

To get started, open the Active users tab in your Microsoft 365 admin center. You can click here to open the right page or expand the hamburger icon in the top-left corner of the admin center and go to Users > Active users.

Then, click on the email account that you want to use to send your WordPress site’s emails. This will expand a slide-out with more options.

In the slide-out, go to the Mail tab. Then, click the Manage email apps option.

Check the box for Authenticated SMTP in the list of options. Then, click the Save changes button at the bottom.

And that’s it! You’re done working in the Microsoft 365 admin center – you’ll do everything else from your Onswim site.

2. Configure SMTP Authentication in Onswim

Configuring Onswim to use your Microsoft 365 email account is quick and easy. Firstly, navigate to Utilities > Communications > Email. Once you are within the Email tab enter the SMTP details for your Microsoft 365 account listed at the top of this article and click Save.