Hey, Adam. On Thursday 01 November 2007, Adam wrote: > Chris Knadle wrote: > > One favorite are email connections that start off with a HELO/EHLO > > greeting that isn't a FQDN as is required by RFC 2821. When I started > > rejecting these it cut out 33% of junk email, without having to do any > > expensive computation. > > Chris, could you explain how to do this, or point me to someplace that > does? Thanks!
I'm doing this with Exim4. There are quite a number of sites with rules for this, I'll just point out one of them: http://attenuate.org/~simon/wiki/Exim,_ClamAV,_SpamAssassin_and_greylisting And if you're running Exim4, I also suggest looking at the smtp_accept_max_per_host setting, which lets you limit how many simultaneous connections a single IP may make. So which MTA are you running? -- Chris -- Chris Knadle [EMAIL PROTECTED]
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