Dual Delivery

Casey

• January 14, 2014 15:40

In Postini we were able to run dual delivery between Google Apps and our in house exchange server. Is there any way with MailRoute to achieve the same results?

 

Thanks,
Casey

0

• Official comment

  

  MailRoute Advanced Support

  • January 22, 2014 00:43

  Hi Casey-

  
  We don't do dual delivery.  Relaying a message to more than one destination can introduce all sorts of issues.  What if one of the destinations is down? What if a user exists at one destination and not the other? What if one of them bounces a message?  And if these are all within one domain, it can be incredibly confusing for the sender.

  It's a bit easier for postini to do that with Google Apps, since it's all within their one silo.  But we'd be relaying to two separate destinations, and this introduces all sorts of potential for trouble.

  The one way it could possibly work would be if the relay to the second site involved a rewrite of the destination address to a different domain (or subdomain).  And if MailRoute were to support aliasing in an upcoming software release in a few months (hint hint), then you could set a forward for each user to the new domain, and that would be delivered independently.  

  For example, you could forward user@domain.com to user-AT-domain.com@backupdomain.com.  

  And then you could rewrite those incoming addresses on that destination mailserver.  If you use postfix, you could do something like:

      virtual_alias_maps = regexp:/etc/postfix/virtual_regexp

      cat /etc/postfix/virtual_regexp

      /(.*)-AT-(.*)@backupdomain.com$/ $1@$2

  Now, that could still result in bounce messages!  But at least the bounce messages would distinguish between a bounce for user@domain.com and user-AT-domain.com@backupdomain.com!

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