_:n59be7dd47d9247b3af02f15369317f31xb1
<http://schema.org/text>
"Hello \n I am using an on premise exchange server (but the same behavior is with O365). Scenario/setup : Exchange 2 domains: domain1.com and domain2.com and setup in Sophos Central with inbound and outbound mail flow through central email and ADSync for users/mailboxes. 2 mailboxes setup with : Mailbox1: SMTP:primaryemail1@domain1.com, smtp:aliasemail1@domain1.com, smtp:aliasemail1@domain2.com Mailbox2: SMTP:primaryemail2@domain2.com, smtp:aliasemail2@domain1.com, smtp:aliasemail2@domain2.com Behavior (email sent to external recipient through Sophos central): Sent from SMTP:primaryemail1@domain1.com &ndash; OK Sent from smtp:aliasemail1@domain1.com &ndash; OK Sent from smtp:aliasemail1@domain2.com &ndash; rejected by Sophos Central Sent from SMTP:primaryemail2@domain2.com &ndash; OK Sent from smtp:aliasemail2@domain1.com &ndash; rejected by Sophos Central Sent from smtp:aliasemail2@domain2.com &ndash; OK Conclusion : If I send an email from an alias address which has a different domain then the primary address then Sophos Central is rejecting the email and not delivering it to the final recipient even both domains are set up in Sophos Central. I have a support case (05321938) open since 06/2022 about this problem, but no solution has been found. Has anyone run into the same problem and found a solution for it? Thanks&rsquo; with kind regards. G&uuml;nter"
<https://community.sophos.com/sophos-email/f/discussions/136709/mails-sent-from-alias-rejected-by-gateway/507083>