By default, Gmail always keeps a copy of mail being sent through its web-interface as well as SMTP server. To further verify, if mail sent from above command is actually sent via Gmail’s SMTP server, you can log into Gmail account with PASSWORD and check “Sent Mail” folder in that Gmail account.Some versions of Novell GroupWise support Trusted Key authentication. The following systems support IMAP: G Suite supports OAuth authentication.
However, most IMAP systems do not support administrative credentials.
