On Wed, Jul 31, 2013 at 09:31:20PM -0400, Roman Gelfand wrote:
> We are running an application which pulls mail from yahoo pop3 server
> and ultimately resends it, via local postfix server, keeping the same
> from and to addresses.
This is not generally possible. POP3 does not record the envelope
addresses, and resending mail to the "To:" and "Cc:" addresses of
already delivered mail is a disaster in the making. Duplicate
deliveries, mail loops, ...
The only thing that is safe to do is to deliver to a fixed local
address that is associated with the remote mailbox.
Can you explain how you determine which addresses to redeliver to?
> The way I see it, there are rare instances
> where from domain requires strict dkim enforcement. As a result,
> yahoo rejects it notifying this postfix server.
DKIM signs content. If you don't modify the message, its DKIM
signature remains valid.
It sure sounds like you're doing something unusual or even unwise.
What real problem are you solving?
--
Viktor.
