On Thu, Oct 20, 2011 at 02:44:16PM +0900, Ian Masters wrote:
> Is it possible to block all attachments with postfix? I'm using
> /etc/postfix/mime_header_checks but I can't seem to block all attachments,
> especially ones without file suffixes.
Be careful what you wish for: The question of what is an "attachment" is
not so simple to answer.
- Is there an attachment in a multipart/alternative message with
text/plain and text/html alternative parts?
- Is there an attachment in a multipart/related message with
a text/html parts and related images referenced through "cid:"?
- Is there an attachment in a message part that has
"Content-Disposition: inline" and a Content-Type of "image/jpeg"?
- Is there an attachment in a message part that has
"Content-Disposition: inline" and a Content-Type of "application/pdf"?
Why is having a "name" or "filename" a reason to reject a message
that you would permit if the MIME part in question had no explicit
name and were instead "inline", or allowed the mail client to choose
a default name?
--
Viktor.
