On Tue, Apr 02, 2002 at 05:02:40PM -0500, Michael Caplan wrote:
> Hello,
>
> I'm somewhat of a MIME and Postfix newbie, so I hope that my question come
> across clear. I am developing a PHP script that dishes out HTML newsletters
> in a MIME multipart/alternative format. The script works great, but some
> users have been complaining that the MIME formatted emails are reaching them
> with corrupted headers (so that they are read as plain text - a big mess!).
> All these users have virtual email accounts that use Postfix as the MTA. It
> seems that when postfix handles the email for the virtual address it messes
> with the header. Any idea why Postfix would do this?

If the example below is typical, you're misreading the headers.

'Received:' headers are to be read from the bottom to the top.

Like this:
> Received: by flag.blackened.net (Postfix, from userid 65534)
> id 932046711; Tue, 2 Apr 2002 13:16:37 -0800 (PST)

This was as it was generated on the web server.

> Received: from flag.blackened.net ([216.240.44.56])
> by tomts15-srv.bellnexxia.net
> (InterMail vM.4.01.03.23 201-229-121-123-20010418) with ESMTP
> id <20020402211646.RVSR24482.tomts15-srv.bellnexxia.netflag.blackened.net>
> for <dialectics-unlimitedsympatico.ca>;
> Tue, 2 Apr 2002 16:16:46 -0500

And then the web server at 216.240.44.56 passed it to an InterMail
server at bellnexxia.net....

You are running postfix on your web server, so, yes, every weird problem
will show Postfix somewhere in the headers. As will every correct mail
that no one tells you about.

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