On Wed, Sep 27, 2006 at 09:15:22AM +1000, Craig Sanders wrote: > > blocking *IMAGE* attachments doesn't. > > and it's easy to do. > > e.g to block embedded(*) images in HTML mail in postfix PCRE body_checks: > > /\bsrc\s*=(?:3D)?\s*"?cid:/ REJECT > > > (*) i.e. where the HTML message refers to an attached image so that it > is displayed when the message is displayed - which is how image spam > works. normal image attachments, not used in the message itself are > unaffected. > That is, unless the MUA is braindead and helpfully turns everything into html and then when the user "attaches" a file, it is actually inlined by attaching the file and then creating the html to make the attached file appear inline. IIRC, this the default behavior of outlook. So, if you have users sending/receiving with outlook, this could be a problem. > > > IMO, debian mail servers should block this crap - at least 90% of > it that is blocked by my systems comes via master.debian.org....so > debian's lists and mail servers are acting as spam forwarders (and spam > multipliers in the case of spam to the lists). there's no legitimate > reason to have such embedded images on debian mailing lists. > No argument there. Regards, -Roberto -- Roberto C. Sanchez http://people.connexer.com/~roberto http://www.connexer.com
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