Author: Suresh Ramasubramanian Date: To: Hochstrasser Benedikt CC: exim-users Subject: Re: [Exim] failed to find host name from IP address
Hochstrasser Benedikt wrote: > Today I see in my logs an increased number of rejections because of
> "failed to find host name from IP address". While this is perfectly fine
> when dealing with spammers I have the uneasy feeling that exim sends a
> reject upon every kind of DNS failure. (some of the DNSes I tried
> managed to resolve the IP in question while others didn't).
>
> Or can someone confirm that eg. upon DNS time-outs exim sends a 451 (?)
> temporary error message instead of a 550?
