Enable SMTP in Microsoft 365 or GoDaddy

Microsoft 365 admin center

1. Open https://admin.microsoft.com/#/users and sign in as an administrator.
2. Click the user whose mailbox you want to connect.
3. Open the Mail tab and click Manage email apps.
4. Tick Authenticated SMTP and click Save changes.
5. If SMTP is still refused, open the Exchange admin center (https://admin.exchange.microsoft.com), then Settings, Mail flow, and untick Turn off SMTP AUTH protocol for your organization.

Microsoft 365 bought through GoDaddy

1. Sign in to GoDaddy and open My Products, then Email and Office.
2. Click Manage All and select the user.
3. Open Advanced settings and turn on SMTP Authentication.
4. Wait a few minutes before connecting.

Connect the mailbox

1. Open Email accounts, click Connect a mailbox, pick Microsoft and choose Use SMTP.
2. The server settings fill in: smtp.office365.com, port 587, TLS.
3. Enter your name, the email address and the mailbox password, then click Connect and test.

Good to know

• If the account uses multi-factor sign-in or security defaults, Microsoft refuses passwords over SMTP. Use Sign in with Microsoft instead.
• Microsoft is retiring password sign-in for SMTP. Sign in with Microsoft keeps working after that.
• With SMTP, replies and warmup cannot be read with a password. Use Sign in with Microsoft for those.