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AOL, as far as I'm concerned, is a lost cause. They will block on rDNS alone, and no amount of calling or emailing will convince them otherwise. Recently, Verizon has gotten pissy about domain names matching the sending server, without even checking SPF.



Since rDNS is one of the simplest things to fix, and absent or inconsistent rDNS one of the most obvious signs of spam, I'm with AOL on that one.

If fact, every email server setup I've seen explicitly rejects emails simply due to absent or inconsistent rDNS records.

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In my 10+ years of running an SMTP server for SOHO use off of first business DSL (where Verizon refused to change rDNS), then cable modem, AOL was the sole server I encountered rejecting on mismatching rDNS alone.

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