who is using require_rdns.m4?

[Steffan Henke]

On Mon, 6 Jun 2005, Jeff A. Earickson wrote:

> There was a thread a while back "block emails with no valid reverse DNS",
> and one of the options was Neil Rickert's require_rdns.m4 hack for
> sendmail.  I'm wondering how many people out there use this successfully?

We are happily using it for a couple of months now. Mails from hosts 
without reverse DNS are rejected with an error message so the user knows 
that his email has not been received.
I think this is a fair behaviour. When I look at the logs, most of the 
rejected hosts are spam sources from either Korea or Brazil.
If I'm not mistaken, AOL dumps email from hosts w/o PTR records to 
/dev/null.

Regards,

Steffan

------------------------ MailScanner list ------------------------
To unsubscribe, email jiscmail at jiscmail.ac.uk with the words:
'leave mailscanner' in the body of the email.
Before posting, read the Wiki (http://wiki.mailscanner.info/) and
the archives (http://www.jiscmail.ac.uk/lists/mailscanner.html).

Support MailScanner development - buy the book off the website!