Re: [Exim] blocking fake yahoo and hotmail

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Author: Suresh Ramasubramanian
Date:  
To: Giuliano Gavazzi
CC: Rossz Vamos-Wentworth, exim-users
Subject: Re: [Exim] blocking fake yahoo and hotmail
Giuliano Gavazzi writes on 11/21/2003 6:45 AM:

> may I point out that "your" here is not "mine" but "his"...


of course. sorry

> the problem is, I have seen DNS giving no reverse (NXDOMAIN) instead of
> either SERVFAIL or <whatever is the correct response for timeouts>.
> In other words, when NXDOMAIN is returned, the reverse will be the empty


nxdomain is never returned unless there's some genuine dns failure. In
which case the sender domain wouldnt resolve and you would end up
rejecting the mail anyway.

    srs


ps -

2003-11-21 16:59:55 H=dsl-217-155-139-146.zen.co.uk (mailhost.humph.com)
[217.155.139.146]:53737 F=<> rejected RCPT
<mailhost.humph.com-1069414193-testing@???>: Unrouteable
address

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