Am 01.10.2014 um 21:40 schrieb Ronald F. Guilmette: > In message <542c35a7.3050...@rhsoft.net>, > "li...@rhsoft.net" <li...@rhsoft.net> wrote: > >> Am 01.10.2014 um 19:04 schrieb Ronald F. Guilmette: >>> What would happen in such a case? Would inbound e-mail start to >>> back up horribly, as Postfix waited for DNS responses that were >>> not forthcoming? >> >> no - no answer is just no answer and mail goes through > > Yeabut, how sloooooooooly?
no idea about postfix without postscreen, i guess also 10 seconds postscreen has 10 seconds timeout for a response and in the next release it is configureable also keep in mind postscreen does all rbl lookups in parallel and finally summarizes the scores postscreen_dnsbl_timeout (default: 10s) The time limit for DNSBL or DNSWL lookups. This is separate from the timeouts in the dnsblog(8) daemon which are defined by system resolver(3) routines. This feature is available in Postfix 2.12.
