Re: [Exim] RFC: Fighting Spam due to forgeries of outblaze …

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Author: Fred Viles
Date:  
To: exim-users
Subject: Re: [Exim] RFC: Fighting Spam due to forgeries of outblaze domains
On 21 Feb 2004 at 0:54, Andrew - Supernews wrote about
    "Re: [Exim] RFC:  Fighting Spam due ":


| >>>>> "Edgar" == Edgar Lovecraft <Edgar> writes:

|
| Edgar> That was my point with the helo/ehlo = verified, I know that
| Edgar> you did not did not mention anything about helo/ehlo, but when
| Edgar> exim does a PTR lookup it just returns what is found to
| Edgar> $sender_host_name.

|
| This is not true. When exim sets $sender_host_name, it _always_
| verifies that the name it sets there also forward-resolves to the
| incoming connection IP.


Good to know. As of 4.22, that behavior is apparently documented
only in the description of $host_lookup. It would be more "visible"
if it were mentioned in the description of $sender_host_name itself.
It also should probably be mentioned, at least by reference, in
section 10.11.

| Ditto for any aliases.


What does that mean? That if there are multiple PTR records all the
corresponding A records are checked?

- Fred