Our Email server address is barracuda.tjca.org with IP Address 18.104.22.168. Some emails are getting rejected with a message saying that the mail is coming from some other server IP address. How's this possible - any suggestions/comments would be helpful - thanks!
There was a SMTP communication problem with the recipient's email
server. Please contact your system administrator.
<mail.tjca.org #5.5.0 smtp;550 Client host rejected: Please see