!!! Overview [{$pagename}] is a [RFC] describing the [Transport Layer Security] ([TLS]) server identity verification procedure for [SMTP] Submission, [IMAP], [POP], and ManageSieve clients. [{$applicationname}] [refers you to the full text|RFC:7817|target='_blank']. !! More Information There might be more information for this subject on one of the following: [{ReferringPagesPlugin before='*' after='\n' }]