On Mon, 2006-01-23 at 09:57, Tim wrote: > On Sun, 2006-01-22 at 17:12 +0000, Paul Howarth wrote: > > My point was that it's virtually impossible to do this because > > attachments can be split up into multiple emails (thus getting around > > size restrictions) and can be included in (say) uuencode format in the > > message body rather than using a MIME-style attachment. > > I don't see why a filter can't strip out attachments done either way. > If one can parse MIME headers, one can also parse for UUE beginning and > end markers. Multipart messages can also be checked for, but even if > not, catching the beginning and end of a multi-part would kill most data > fairly well. On the sendmail side, using MimeDefang as a milter would be a good place to start. The default setup includes a set of 'bad' filename extensions (things windows boxes will automatically execute) and code to strip them. The actions are controlled by a snippet of perl that you can easily change to do whatever you want. -- Les Mikesell lesmikesell@xxxxxxxxx
