Gmail SMTP Settings (Updated Guide)
https://www.gmass.co/blog/gmail-smtp17.09.2021 · Gmail SMTP port: 465 (SMTP SSL) or 587 (SMTP TLS) Note : SMTP authentication highlights that the mail client has permission to relay emails through the Gmail server. In some cases, you’ll need to authenticate your domain name, which will help prevent your bulk emails from being labeled as suspicious emails.