Timo Sirainen:
> There's a problem with aliases that LMTP server can't solve. Lets
> say I have two aliases:
>
> info@domain -> shared@domain
> sales@domain -> shared@domain
>
> The LMTP server sees RCPT TO:<shared@domain> for mails that arrive
> to both of them. If the sender sent the mail to only one of them,
> the original address can at least in theory be read from the
> Received: lines. If the sender sent the mail to both of these
> aliases, the LMTP server won't see the originating address anywhere
> at all.
I wonder if careful use of the DSN extension would help. With DSN,
the SMTP/LMTP client sends the original recipient with:
RCPT TO:<final-rcpt> ORCPT=rfc822;orig-rcpt ...
That's either the address that the Postfix SMTP server received
with RCPT TO + ORCPT, or Postfix's best guess (which could be a
bare username in the case of command-line submission, something
that should be fixed).
One problem is that DSN hands off the responsibility to notify the
sender about successful delivery. I don't know if that is desirable.
Wietse
