Author: Stuart Rowan Date: To: exim-users Subject: Re: [exim] UCEPROTECT Blacklists and why callouts are abusive
David Saez Padros wrote: > Hi !!
>
>>> In fact any callout that you receive is another bounce that you avoid
>>> receiving, so if you ever faced that situation you will really prefer
>>> callouts than bounces.
>> Personally I'd prefer that more mail admins learn to reject mail
>> outright, rather than accept and bounce. Then I wouldn't have to deal
>> with the bounce or a callout.
>
> This could be in a perfect world, we always try to reject at smtp time
> but not all people could do that. Some very large spanish providers
> (and many others around the world) just accept anything on the mx hosts
> and then route the message to other hosts that know if the user really
> exists so they cannot reject unknown users at smtp time.
> These providers could (should?) do recipient callouts surely?
