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sumpf's avatar
sumpf
Copper Contributor
Aug 23, 2023

Internal mails get sent to primary smtp instead of alias

Hey there,

 

in our company we have a service mailbox (user mailbox) with several aliases for different top level domains.

 

Before they were all separate mail boxes with different mail rules, but for simplicity and management we merged they all on the main (.com) domain and combined the mail/forwarding rules.

 

Now we have the issue that internal mails sent/forwarded to the alias domains, automatically get resolved and sent to the primary SMTP address and therefore the mail rules don't get triggered.

Alias also won't show in the mail header.

 

We have already deleted all offline address books(OAB), enforced the use of the GAL (via client and registry) and cleared all caches.

 

Also, not all internal mail accounts are affected, since this usually happens with accounts which are in the delegation of the service mailbox (via security group) yet not all of them are affected.

 

Any suggestions?

 

 

 

8 Replies

  • Hey guys, is there any solutions to this? We have the same problem, we need to forward emails to aliases of one mailbox, but the TO addresses get resolved as primary SMTP internally and it invalidates other rules. We need to use other mail provider to workaround this "user-friendly" architecture.

    • Victor_Ivanidze's avatar
      Victor_Ivanidze
      Bronze Contributor

      Have a look at this: https://ivasoft.com/sortaliasessharedflow.shtml

  • That is expected and by design. If you look at a message Trace you will see the Resolve Event, that does exaclty that.
    Regards
    Andres
    • sumpf's avatar
      sumpf
      Copper Contributor
      okay I got that, but is there a way around it? Like forcing the address resolution to choose the alias?
      • Dan_Snape's avatar
        Dan_Snape
        Iron Contributor

        No there's not...this is how Exchange is designed. The sender will always resolve the primary address for the recipient even if the message is sent to an alias address

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