What is SMTP authentication? SMTP Auth explained - IONOS
https://www.ionos.com/digitalguide/e-mail/technical-matters/smtp-auth/
WebSep 27, 2023 · SMTP authentication, also known as SMTP AUTH or ASMTP, is an extension of the extended SMTP (ESMTP), which, in turn, is an extension of the SMTP network protocol. It allows an SMTP client to log on to an SMTP server using an authentication mechanism. This ensures that only trustworthy users can send and …
DA: 30 PA: 38 MOZ Rank: 22