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by jlgaddis
3133 days ago
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DNSBLs [0] are very popular. Pretty much anyone running a mail server that accepts connectiona from the public Internet use them -- you have to! I manage several mail servers and I use many different DNSBLs, including one of my own. The best anti-spam advice I could give WRT your Exchange box (I've managed those too) is to put another box in front of it to handle the spam filtering (Postfix + SpamAssassin + friends in my case, but you have many options), though IIRC even Exchange can directly use these blacklists nowadays. [0]: https://en.wikipedia.org/wiki/DNSBL |
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