> Are you talking about reverse DNS or HELO? Even the so-called experts > just can't get it right with reverse DNS -- many legitimate mailserver > IPs have a reverse DNS entry that looks a lot like a dynamic IP (often > the exact same format as a dynamic IP from the same Internet > provider). HELO, though, is a different story -- occasionally a > legitimate mailserver will HELO as something that looks dynamic, but > that is quite rare (and easily fixable by the mailserver admin, unlike > the reverse DNS that is sometimes fixable but sometimes is not).
How could a PTR record not be fixable?
Someone running a mailserver by definition has access to the mailserver to make any necessary changes there. If they don't have access, it isn't their mailserver (such as outsourced E-mail).
Just edit it, update the serial number, and reload.
That assumes that you have access to the reverse DNS, which isn't always the case. It is very common for companies with business cable/DSL accounts not to have access to the reverse DNS; it also happens with other types of connections (even T1) as well.
Yes, you could switch to another provider. But that is something that takes much, much more time, planning, and resources than changing one incorrect mailserver settings.
-Scott
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