Oct 25, 2012

Configure SMTP Server on Windows 2012 to use Gmail to Jan 21, 2014 E-MailRelay download | SourceForge.net Jul 06, 2020

Configure hMailServer with external Gmail SMTP » domalab

Oct 03, 2019

Try the options below if you see this error: "The server you are connected to is using a security certificate that could not be verified. The certificate's CN name does not match the passed value." Make sure you've set up your mail client for IMAP and not POP. Check your Incoming Server setting to make sure it says imap.gmail.com and not pop

Maybe the password changed recently. Also make sure the SMTP mail server name is correct. The logon name is not authorized to relay messages. Your logon credentials may be correct, but the email account is not authorized to relay messages through the SMTP server. Make sure the Gmail account is set to Allow less secure apps as described above. How to correct 554 5.7.1 : Relay access - Server Sitters