Re: Requiring reverse DNS lookup

From: John Peach (no email)
Date: Wed May 01 2002 - 14:28:24 EDT


> Currently I have my server configured to require that any sending host
> has a valid reverse DNS lookup, which has cut down the amount of UCE we
> receive a lot. However we have one client who has no reverse lookup, and
> insist they have no intention of fixing it.
>
> How have other people found this checking works, should I abandon it and
> go back to header checks, or carry on trying to get them to fix it. Or
> alternatively could I accept mail from them with no reverse as an
> exception; perhaps by putting their domain in 'sender'?
>

I gave up with it. Too many broken implementations; but if you want to allow them in:

check_client_access hash:/etc/postfix/access_client

and in access_client:

63.144.202.23 OK

or whatever their IP address...

Obviously a broken one I was allowing through :-)

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