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Exchange 2010, Offise365 and Postfix coexistence

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Hi,

I have Exchange 2010 SP2 environment and Postfix server as mail gateway. I successfully configured Exchange Hybrid Configuration and can move malboxes from on-premises domain to cloud and back. 

MX record (tratata.com) in DNS point to postfix server with priority 10. On Postfix configured all aliases.


I need that all e-mails sended to Office365 and if the mailbox not found in Office365 and Exchage, must go to Postfix server. 


How do I need to reconfigure the mail infrastructure?

Verified Answer
  • Sounds like you would create a mail routing loop if you did that. Here is your scenario:

    Message from Internet --> Postfix --> Exchange 2010 --> Deliver or forward to O365

    If you configure O365 to re-route mail back to on-prem it would endlessly loop. Maybe I am just reading this wrong?

  • Sorry to say but no, catch all email addresses are not allowed in Office 365.

    Thanks,

    1 out of 1 people found this post helpful.

All Replies
  • Sounds like you would create a mail routing loop if you did that. Here is your scenario:

    Message from Internet --> Postfix --> Exchange 2010 --> Deliver or forward to O365

    If you configure O365 to re-route mail back to on-prem it would endlessly loop. Maybe I am just reading this wrong?

  • Hi,

    Thanks for your answer!

    I would like configure like "catch all" in Exchange 2010. Do I have the ability to configure the "catch all" in Offise365?

  • Sorry to say but no, catch all email addresses are not allowed in Office 365.

    Thanks,

    1 out of 1 people found this post helpful.

  • Hello Engineer,

    How are things going? Did PlanetJorge answer your question to your satisfaction? If you have additional questions or concerns; feel free to update the post.

     

    Best regards,
    Roger