SMTP settings are dependent on who hosts your email address. Below, you will find the most common SMTP setup information. To get this information for another provider, please either contact your IT department or your Internet service provider.
GMAIL
SMTP Address: smtp.gmail.com
Port: 587 with SSL
You will need to set up Google App Passwords with 2-Step Authentication if you haven't already, and enter a 16-digit passcode from Google in the SMTP password field. You can find instructions in our article: How do I use Google App Passwords with SMTP email in SiteLink.
If you receive the following error when testing: "The SMTP server requires a secure connection or the client was not authenticated. The server response was: 5.5.1 Authentication Required," please follow the instructions located here.
GoDaddy/Secureserver
SMTP Address: smtpout.secureserver.net
Port (No SSL): 25 or 3535
Port (with SSL): 587
Microsoft/Office365
Microsoft phased out its SMTP email in September 2025. Please see our help page on setting up Microsoft Open Authorization (OAuth) email for SiteLink Web Edition and Corporate Control Center.
SBCGlobal.net
SMTP Address: smtp.att.yahoo.com
Port: 587 with SSL
Be sure the BCC email address matches the SMTP username. If they are different, change the site email address to match the SMTP username.
Yahoo
SMTP Address: smtp.mail.yahoo.com
Port: 465 or 587 with SSL
Follow these steps to enable Less Secure Apps in your Yahoo account:
Go to Account Info
Select “Account Security”
Enable “Allow Apps that use less secure sign-in"
AT&T
5SMTP Address: outbound.att.net
Port: 465 with SSL
1&1 IONOS
SMTP Address: smtp.ionos.com
Port: 25 no SSL
Your username is not the full email address
Ex: m12345678-123456789
Inmotionhosting.com
SMTP Address: secure127.inmotionhosting.com
SMTP Port: 587
Make sure Use SSL is not checked