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Subject: Re: postfix appending to the from field
From: Wietse Venema (wietseporcupine.org)
Date: Fri Dec 01 2000 - 18:23:27 CST

Don Moen:
> Thanks Wietse!
>
> I agree with the part about the broken software.
>
> How would you suggest making the change for a LOCAL Postfix mailing list to
> avoid changing
> the envelope sender to the list return address?

Don't do it. Posters will hate you because they get all the
out-of-office notifications, and users will insist that you deliver
that same cool behavior for external mailing lists that you have no
control over.

The last thing I need is Postfix patches to replace the envelope
sender with the From: address, in order to give users of broken
software the illusion that their software works correctly.

        Wietse

> -----Original Message-----
> From: wietseporcupine.org [mailto:wietseporcupine.org]
> Sent: Friday, December 01, 2000 12:29 PM
> To: postfix-userspostfix.org
> Subject: Re: postfix appending to the from field
>
>
> Don Moen:
> > I am using postfix to relay email from one of my domains with a return
> path
> > set to another of my domains.
>
> > I would like to eliminate the From: field
> > expansion that is visible within certain email clients. It shows up in
> the
> > From: field in the form of:
> >
> > return-pathmy-domain.com on behalf of User Name
> > [from-pathmy-other-domain.com]
>
> You mean broken software that takes list mail like this:
>
> Return-Path: mailing-list-return-address
> From: original-poster-address (Original Poster Name)
> To: mailing-list-submission-address
>
> And that presents it to the recipient as:
>
> From: mailing-list-return-address On Behalf Of Original Poster Name
> To: mailing-list-submission-address
>
> This From: address brain damage is not due to Postfix. It is due
> to broken software that I am not responsible for.
>
> > I was told by a friend that it's possible to keep Postfix from sending
> email
> > that's interpreted in this way, while still maintaining a separate return
> > path. Is this true? If so, suggestions how to accomplish it will be
> > appreciated? He could not recall how to do it.
>
> The problem is that some broken software replaces the original
> poster's mail address by the envelope sender address (the mailing
> list return address in the above example).
>
> To work around this lack of intelligence in some broken software
> one would have to replace the envelope sender address by the address
> of the original poster.
>
> Doing so would be in serious conflict with basic Internet mail
> standards. It is this behavior that causes some broken software
> to send "out of office" notifications to the poster of a mailing
> list submission, when the author really could not care less whether
> the recipient is in the office, in the bathroom or on the beach.
>
> It is possible for a LOCAL Postfix mailing list to avoid changing
> the envelope sender to the list return address, but that does not
> solve the problem for other mailing list mail.
>
> Wietse
>
>
>