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I have seen lots of SaaS solutions provide client specific email URLs like the following: anyalias@*.mydomain.com. This is a new concept to me but i need to adopt it for future application requirements. Few questions.

  1. can i populate a "*.mydomain.com" MX record to push mail to ANY subdomain to a certain email host? Will my existing domain.com MX continue as normal?
  2. Is there an email server or hosted service that could function as a single "catch-all" mailbox. Then we would design an agent or service to parse the messages.

I am kinda stumped on this one so please contribute in any way even if it means asking a question!

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1) yes, this is possible (it actually depends on your dns server, but afaik most of them can handle wildcard records)

example.com   3600 MX 10 server1.example.com
*.example.com 3600 MX 10 server2.example.com

2) Accepting all subdomains is certainly possible with postfix, other MTAs probably as well. Parsing messages (as in "read headers to get the recipient") is rarely a good idea, it's safer to filter based on the envelope recipient address. But it really depends on what exactly you are trying to do with those messages.

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  • Thanks for your input. The purpose is to serve as an input for DMS. The receive alias and sub-domain are metadata we can use within our application.
    – MaCuban
    Mar 5, 2013 at 17:17

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