Здравствуйте.
В сообщении от 22 марта 2007 James Price написал(a):
> I've noticed and read up to confirm, most image spam comes in with the
> following in the header. I have an ACL rule already in acl_smtp_mime as
> follows:
>
> deny message = Image SPAM detected: message denied
> condition = ${if eq{$mime_content_type}{multipart/related}{1}{0}}
>
>
> I'm looking for this:
> Content-Type: multipart/related;
> type="multipart/alternative";
>
> If I wanted to expand my rule above to also require matching of the
> multipart/alternative, how would I do that since they're in the same
> string?
>
> If anyone has other more effective ideas to stop image spam, I'm open to
> suggestions. The rule above has caused some issues with false positives
> for me.
>
mmm... simple check for images:
acl_check_mime:
# Black attachments
deny
message = BAD ATTACHMENT, zip it, please. Contact \
postmaster@??? if questions.
condition = ${if match {$mime_filename} \
{\N\.(gif|png|jpg|jpeg|pjpeg|bmp|tiff|tif|pcx)$\N} }
accept
This must not allow messages with images to pass - mostly spam, but also may
be some maillists, as subscribe.ru - use whitelist for them.
