(Apologies if you received multiple copies of my last email; must have
had my finger on the send button to long!)
But does it check each address that the email has passed through or just
the source? In any case a reverse DNS only checks that there is a
registered host for that address. Unless you check that he registered
host is a valid MX for the domain, there is no point doing the check. Or
is there?
Ted wrote:
the config.txt for RCVPNL v0.14 says this:
Reverse DNS incoming IP addresses: enabling this setting will take the
IP address of the remote server and perform a reverse DNS lookup on it.
The reversed information will be placed where UNVERIFIED would usually
be in the Received: line. Enabling this setting may slow the
performance of the server if your DNS servers are particularly slow.
Additionally, Windows has this annoying habit of attempting to resolve
the computer name using NETBIOS if no reverse DNS data is found. If
you see single all caps names in the place where UNVERIFIED would
usually be, this is what happened.
It reads to me like it just logs the result from a reverse lookup, but
I have never used that option, so I cannot say from experience.
