I have an e-mail server powered by Postfix. Aside from traditional e-mail accounts on my server, I want to maintain some accounts whose only role is to forward all incoming mail to differnet address on different mail system.
For example. I own domain
example.com and I set account with address
email@example.com on my server. And I want this one account to forward all incoming messages to mailbox in different mail system, in domain that does not belong to me
I know, that i can add an entry in in my
virtual_alias_maps lookup table.
But I'm worried that to deliver message, Postfix will use original envelope sender address. It's okay if sender is from domain example.com that belongs to me, but otherwise
stranger.net server may classify this message as a spam.
Is there some way, to alter envelope sender on delivery ?
smtp_generic_maps ment for this ?
If so, is it okay, that my server sends an e-mail using specific envelope sender, and then something else in message being forwarded ?
How else to deal with such problem ?