Francis, This is the exact error I have had before. I have the same setup - your *whole* description below is *exactly* what I have. I have had this problem while on 1.15 & 1.17 also. However at the time though, I did not know why my emails were failing. The only difference is that I have not had an issue with hotmail, usually it is with some other domains. Perhaps my users don't send to hotmail as much. I have not had the time to debug it to an absolute end and offer proof, and so the previous thread died.
I have tracked it down to the fact that every domain that I have had problems with has had an A record for the domain & that A record resolves to a different IP than that of the MX record. This in itself is not a DNS problem (normal dns operation). But I have found that clearing xmail's dns cache & restarting xmail resolves the problem for a while. IIRC just restarting xmail might be enough. I actually used the SmartDNSHost only *after* I have troubles with MX & A records, but while the problem *seems* to have reduced, it has not gone. It does seem to be a logic issue in xmail's mx resolving code, but I have no proof. I expect that an Ethereal trace before and after is the only thing that can be done to prove it. Hopefully this info will help someone that has the time & the symptoms to get to the bottom of it. Rob :) -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of CLEMENT Francis Sent: Wednesday, August 31, 2005 6:55 PM To: 'xmail@xmailserver.org' Subject: [xmail] Re: messages to yahoo and or hotmail does not get delivered As I said, I have to setup a 'no-production' server to get dns tcp dumps to help find the problem. At now, here are some infos : Configuration : XMail Server : - Windows 2000 server SP4 + all patchs - XMail 1.21 - XMail directed to use "SmartDNSHost" to point to DNS server Dns Server used : - Windows 2000 server SP4 + all patchs - Microsoft DNS Server (included in w2k) In this configuration, SOME TIMES, no mail is delivered to hotmail.com : XMail said : "The maximum number of delivery attempts has been reached" Analysing the spool file, the POINTED mail server for hotmail IS NOT one of the MX's declared in hotmail.com zone Doing a nslookup USING the above dns server get the good MX list. Doing a nslookup to find the A records for hotmail.com returns THE IP used by xmail to deliver !! Verifying the xmail dns cache get THE GOOD MX's in the hotmail.com file So its very STRANGE ! XMAIL first get the GOOD MX's to fill it's dns cache, but for some reasons use the domain A record to deliver !! When stopping xmail, clearing the xmail dns cache completly (sub directories mx and dns) then restarting xmail resultes in xmail USING the good MX's for some times, then, suddently use the A record again ... Note : Before using xmail 1.21 I used 1.17 WITHOUT problems with this setup (same server, same dns, same ips, ...) and never used 1.18 nor 1.19 nor 1.20, so I don't know if the problem was not allready here with them. (I started using 1.21 for smtp filters capabilities...) The change log shows that started with 1.18 there were some changes in the dns code part in xmail but I don't know if it could generate the problem (related to 'Fixed a bug in the DNS resolved that made XMail to not correctly handle domain CNAMEs.') .... I'm not enought familiarised in xmail internals to said yes or not .... Could we have a 'test' version with the pre-1.18 resolver in a 1.21 to see what appends ? Francis > -----Message d'origine----- > De : Jeff Buehler [mailto:[EMAIL PROTECTED] Envoyé : mercredi 31 > août 2005 00:45 À : xmail@xmailserver.org Objet : [xmail] Re: messages > to yahoo and or hotmail does not get delivered > > > > Some people are distinctly having this problem with 1.21, and others > are distinctly not having this problem with 1.21? Sounds fishy to me > - there must be some sort of common attribute of the systems that are > having the problem... it is also suspect because it is intermittent, > and so there is a big difference between a consistent problem with > Hotmail/MSN and a different consistent problem with Hotmail AND Yahoo, > so fine grained analysis seems to me the only solution. For example, > what exactly is the common error. I have hundreds (or more) emails > being sent to Yahoo and Hotmail every day without any difficulty > running1.21 from a FreeBSD system with BIND. Are you absolutely > certain that the problem you had with MSN/Hotmail on your Fedora > system is the same problem that the others are seeing? > > If there is a problem that is clearly identifiable I would think that > very specific information would be necessary to track it down > - what is > the (exact) OS, is BIND being run by anyone that has seen this problem > (and can identify it as the same problem exactly), and so on. > This was > basically what I put forward last time, but there was no real "hard > data" to go on, so the thread just died. The only alternative I see > is hard-core debugging on production systems, which wouldn't appeal to > me very much. > > Jeff > - To unsubscribe from this list: send the line "unsubscribe xmail" in the body of a message to [EMAIL PROTECTED] For general help: send the line "help" in the body of a message to [EMAIL PROTECTED] - To unsubscribe from this list: send the line "unsubscribe xmail" in the body of a message to [EMAIL PROTECTED] For general help: send the line "help" in the body of a message to [EMAIL PROTECTED]
