Well the worst is verizon.net's servers. Verizon runs a home-grown callback verifier. You send them an e-mail and during the SMTP acceptance phase they attempt a mail-from from a separate IP subnet ( 206.46.252.0/24 ) and if that gets delayed, they don't accept the mail. (if it works they abort the smtp phase of the verifier, and complete the acceptance of the message they send to you. The problem is the verifier comes from a random IP number in that range. You could spend all day long resending to them before getting lucky and having their verifier use the same IP number it used before.
We also found a few idiots running obviously hacked mailservers. For example the local newspaper here, the Oregonian, if you issue an error 4xx to their server, they will abort and return to sender in violation of the RFCs. Integra telecom is another one that does something similar to that, they ignore error 4xx's and assume your site isn't acceptimg mail from them. We have also had trouble with yahoo, not all the yahoo IP subnets that send mail are listed in the greylist exception list. But I don't know yet if we have stomped that, because we are still having trouble with mail from yahoo groups, it's all coming in duplicated twice. Ted >-----Original Message----- >From: Alex Zbyslaw [mailto:[EMAIL PROTECTED] >Sent: Thursday, February 02, 2006 3:58 AM >To: Ted Mittelstaedt >Cc: freebsd-questions@freebsd.org >Subject: Re: Getting a new server > > >Ted Mittelstaedt wrote: > >>[...] But, seriously think about chucking >>all that and just run greylist-milter. [...] >> >>There's a few IP numbers and mailservers that need to be defined >>in the exclusion list for greylist milter that aren't in the stock >>exclusion list, but other than that, it is the best antispam tool I've >>used in years. >> >> >> >Can you elaborate a little? I.e. what IP's and mailservers, and why? >Thanks, > >--Alex > > >-- >No virus found in this incoming message. >Checked by AVG Free Edition. >Version: 7.1.375 / Virus Database: 267.15.0/248 - Release Date: 2/1/2006 > _______________________________________________ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"