Which SMTP Port to Use for Email: 25, 587, 465, or 2525?
SMTP Port: How to Choose the Right One?
How to setup a SMTP relay for Kerio Connect
Bizagi Studio > Process wizard > Business Rules > Defining notifications > Email server configuration > Using an SMTP server > Using the IIS as an SMTP server > Using the IIS SMTP as a relay
Web Server SMTP settings | Arts Management Systems
Outgoing SMTP Mail Relay Service | For INBOX delivery