Gregory Ruiz-Ade wrote:
> Hopefully one of the other unix gurus here can help me out in my  
> moment of amnesia.
> 
> Given:
> 
>  * two domains, "domain.tld" and "sub.domain.tld"
>  * one user, "user"
> 
> If the MX for domain.tld is configured to forward all email for  
> "[EMAIL PROTECTED]" to "[EMAIL PROTECTED]", what is the SMTP envelope- 
> to address, when the MX for domain.tld connects to the MX for  
> sub.domain.tld to deliver the message?

I'm not understanding the question.

Scenario one:
The MX record for domain.tld is sub.domain.tld, with no other MX
records.

Scenario two:
The MTA on domain.tld is set to forward (say, via alias) to
sub.domain.tld

In scenario one, the envelope would be to [EMAIL PROTECTED] because the
sender would be contacting the MTA on sub.domain.tld directly.

In scenario two, the envelope would be to [EMAIL PROTECTED] as the MTA
on domain.tld would be handling the forwarding.

I suspect you are thinking of scenario two, but I only hear of MX with
respect to DNS records.

-john


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