Author: Giuliano Gavazzi Date: To: Brian, exim-users Subject: Re: [Exim] roadrunner broke my new toy..
At 8:43 am -0400 2004/05/03, Brian wrote:
[...] >smarthost setup I had. Using the logic of "If I can verify the sender,
>if the recipient doesn't exist, I'll be able to send back a message to a
>valid originator." (and I won't need to send all my bounces to a smart
BAD logic. If the recipient does not exist (and we are talking here
of incoming messages) you must reject it at SMTP time. If you wait
later, then please forget of bouncing it as the sender is easily
forged and most of this will be spam/virus.
>require verify = sender/callout=10s
> message = unrouteable sender domain
>
>as per the spec.txt (38.22) tells me that this will spend 10 seconds on
>this. Which is more than enough time. So I've found that I get this [...]
who said that this is more then enough time? 10 seconds? Many busy
servers take longer to display the banner, and don't forget many also
lookup your IP address.
