On Wed, Jan 26, 2011 at 07:42:47PM +0100, Georg Sch?nweger wrote:

> aha, thx for this info! I tried smtp_generic_maps already, the problem
> with that is that it overrides envelope AND header addresses. I want to
> override only the envelope address (Return-Path). Any other ideas?

If it just for the envelope sender, sender_canonical_maps is not as
problematic, since the semantic issues arise when headers are rewritten
inconsistently (different rewriting of From:/To:/Cc:/Reply-To:).

> Is sender_canonical_maps buggy? should i deactivate it anyway?

Not buggy, just difficult to use correctly.

> >> i have here postfix 2.6.5 on Ubuntu. Outgouing mails are sent via an
> >> external SMTP Server (relayhost..). When i send an email from a local
> >> user to a real email address i have in the email header "Return-Path:
> >> root@SERVER_NAME". So i can't get back any bouncing or error mails.. I
> >> use the server mainly for websites so when i send mails via the
> >> webserver then i have the same problem, the envelope sender is
> >> "www-data@SERVER_NAME" (i know i could change this via PHP-Mail command
> >> but i'm using a CMS and i won't change that..) So i tried to masquerade
> >> ONLY the envelope sender address. For this i use Canonical address mapping.
> >> /etc/postfix/main.cf:
> >> sender_canonical_classes = envelope_sender
> >> sender_canonical_maps = hash:/etc/postfix/sender_canonical

With appropriate table data, it should be possible to rewrite given
envelope senders to given alternative envelope senders.

-- 
        Viktor.

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