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Why Are We on E-mail Blacklists?

LogicallyRogue asks: "I run an email server for a small webhosting company. We've crawled all around the email server to make it as secure as possible: tightened Sendmail's security, POP Before SMTP, denying non-authenticated relaying, using SpamCop DNS blacklist, etc. However, with all this in place, every few months, it seems that we have been blacklisted by some ISP somewhere. This month it was AOL. We had no warning, and we don't know why we were blacklisted. All the information we have is a single URL. We visit all the DNS blacklist services we can to be sure we are not on any of them. We send emails to the postmasters inquiring for more information (like perhaps a reason or copy of the email that made the ISP blacklist us) - however, those are usually bounced back because we are blacklisted. We've tried calling the Blacklisting ISP tech support - and usually get the stunned I-have-no-clue-what-you-are-talking-about silence. Have any other Slashdot readers experienced similar problems with blacklisting and the big ISPs?"

2 of 118 comments (clear)

  1. (OT) www.rfc-ignorant.org by Xylocain · · Score: 0, Offtopic

    Heh, one would expect www.rfc-ignorant.org to be compliant with Internet standards. It's, however, not when it comes to HTML at least...

  2. Re:The next generation of competition killer! by Micro$will · · Score: 0, Offtopic

    New from Fisher Price:
    AOL = "My First ISP"
    Motorola = "My First Cell Phone" - now in pretty colors!
    Windows = "My First Operating System"