>-----Message d'origine----- >De : xmail-boun...@xmailserver.org >[mailto:xmail-boun...@xmailserver.org]de la part de Davide Libenzi >Envoye : mercredi 3 novembre 2010 03:57 >A : XMail Users Mailing List >Objet : Re: [xmail] problem with mx ip selection on retries > > >On Tue, 2 Nov 2010, Sabahattin Gucukoglu wrote: > >> On 2 Nov 2010, at 11:25, <fcxm...@aquinet.net> ><fcxm...@aquinet.net> wrote: >> > I found an problem in xmail when re-trying to connect to >mx with multiple >> > ips >> > >> > Here is a sample : >> > Assuming domain XX.com have this dns setup >> > >> > xx.com mx 10 mx10.xx.com >> > xx.com mx 20 mx20.xx.com >> > >> > mx10.xx.com A 10.10.10.1 >> > mx10.xx.com A 10.10.10.2 >> > mx10.xx.com A 10.10.10.3 >> > >> > mx20.xx.com A 20.20.20.1 >> > mx20.xx.com A 20.20.20.2 >> > >> > supposing xmail have now to send a mail @xx.com >> > on first try it use mx10.xx.com at 10.10.10.1 : now the >tcp connection don't >> > work >> > then os same first try xmail use mx20 at 20.20.20.2 : >suppose tcp connection >> > don't work too ! >> > >> > What i see in a trace is that for ALL the others retries >for this mail, >> > xmail retries ONLY on SAME ips, 10.10.10.1 and 20.20.20.2 >> > It never retry on others mx's ips !! And because there was >no response from >> > these two ips, mail bounced back to sender after all >possible retries :-/ >> > (i checked the others ips, they responded correctly :-/ >but xmail never >> > tried them ...) >> > >> > I think this is a major bug :( >> >> It's not violating the standard, but in the interests of >robustness, I >> agree that it is a problem. See: >> http://tools.ietf.org/html/rfc5321#section-5 >> >> Another peculiar XMail behaviour is that even if the >hostname in an MX >> record is unknown, XMail logs an error but then tries again. > This only >> makes sense if the recipient fixes his MX records, which I >think is more >> likely if the mail is permanently failed rather than >temporarily. In >> Postfix, it's user-configurable which method is used. Again, no >> violation of the spec, but my preference is for a behaviour that is >> somewhat more robust, especially today with spam-filled queues >> everywhere. > >Note that if the remote domain would properly implement RR >DNS, the issue >would not arise, as the IP list would be permuted at every lookup. >Of course, people does RR DNS with TTL of one day, which kinda >defeats the >purpose. >XMail could do its own random-pickup in the supplied list, but this is >really not its own task. >
This was exactly the case here, RR DNS worked (see my previous response) Francis _______________________________________________ xmail mailing list xmail@xmailserver.org http://xmailserver.org/mailman/listinfo/xmail
