Vladimir Koshelenko wrote:
> You can use *any* RBL - just do not block mail, if you do not want to lost
> mail. Try to impose delay 20s after every SMTP command if sender sits in RBL.
> Most spammers will not deal with such slow server.
>
> Example:
>
> acl_check_connect:
>
> warn
> dnslists = zen.spamhaus.org
> set acl_c_delay = true
> ...
> ...
> accept
> set acl_c_wait = ${if def:acl_c_delay {20}{0}}
> delay = ${acl_c_wait}s
>
>
> and in every ACL add this instead plain accept:
>
> accept
> set acl_c_wait = ${if def:acl_c_delay {20}{0}}
> delay = ${acl_c_wait}s
I already experiemented with this. Some servers will not wait more than so
much time (1-2 minutes) for the entire smtp transaction or atleast until the
data phase. It came as no surprise that hotmail was one of those. You may
wish to apply the delay to the first RCPT and not the rest.
