Chuq Von Rospach <[EMAIL PROTECTED]> writes:
> Just a quick note if you're someone who uses bulk_mailer for
> delivery. I'm seeing sites who are attempting to implement spam blocking
> by rejecting mail with the words "bulk mailer" or "bulk_mailer" in the
> received headers. This is patently silly, but it seems to be increasing.
> If you use bulk_mailer behind majordomo or some other mail system, you
> ought to be aware of this. It puts its name in a received line, so it
> can get trapped by this. What I've done is simply recompile the program
> to change that string to something less likely to be trapped by mistake.
It's almost certainly not by mistake. It's because mailing lists and spam
runs are served well by essentially the same technology, namely technology
designed to send out a single message to a lot of people with reasonable
resource utilization. Spammers therefore are increasingly using standard
mailing list tools to send out spam. And of course clueless anti-spammers
looking for things to block are seeing those patterns and not paying
attention to the fact that they also occur in legitimate e-mail.
I've seen people block qmail Received headers for this same reason before.
I fully expect to see at least a few reports of people doing the same with
Postfix. Any new tool that handles e-mail more efficiently or with more
speed will eventually be used by an intelligent spammer, and then will
start getting blocked by clueless sites.
--
Russ Allbery ([EMAIL PROTECTED]) <URL:http://www.eyrie.org/~eagle/>
