OSEC

Neohapsis is currently accepting applications for employment. For more information, please visit our website www.neohapsis.com or email hr@neohapsis.com
 
Subject: Re: attached files and outlook
From: Wietse Venema (wietseporcupine.org)
Date: Tue Mar 07 2000 - 06:24:37 CST

Emmanuel Thiry:
> Hi there,
>
> I run Postfix (19990906-pl08) on a Linux system (Mandrake 6), and the
> clients use Outlook (97 or 2000) or Outlook Express with POP/SMTP.
> It seems that there are problems with attached files.
> In some cases, the recipient of a message that contains an attached file
> (say a .doc) cannot see the attached file at all. The received message has a
> consistent size (that is more than the same message without the attached
> file), but the mail software doesn't see that there is an attached file.
> What puzzles me the most is that I cannot sort out a pattern : between two
> clients it works fine, but between two others it doesn't, even if all of
> them use Outlook 97.

Postfix does not modify MIME headers. In fact, the only time Postfix
messes up the mail formatting is when one message header has more
than header_size_limit characters (default: 102400). In that case,
attachments appear as part of the message, so they still are not lost.

> In one case, a client send with Outlook 97 a message with a file attached.
> When the recipient uses Outlook Express, the file is not visible. But when
> he uses Outlook 97, the file is visible.
>
> I think that Postfix is involved because when I tried with Exchange Server,
> running only POP and SMTP, in all case the attached files were OK.

Can you verify that Postfix is actually involved? For this you
need to examine the full message headers.

        Wietse