interesting.... a) I get the same behavior b) same c) same d) same e) from what I gather from a small discovery session, MTA running on a micro$oft os have a problem with my MTAs or accepting a 'telnet 25'. now notice that this is happening only on 2 of the 3 woody boxes (identically configured). my initial thought was that we were not revese dns-ing properly. after spending some time and proving to myself that the reverse worked fine, I dug into bind to see if the zone transfers were taking place as expected. this is when I read about the MS DNS - bind9 zone transfer problem (found in bind docs). My quick fix was to use the box that was ok telnet-ing as a smart host until I figure out what the heck is going on. I was thinking this is a bind9 issue but if you are using bind8, something else is going on... will keep you posted if I find anything. ----- Original Message ----- From: "Jaume Teixi" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Friday, July 13, 2001 9:43 PM Subject: Re: strange smtp blockings (MS DNS zone and bind 8 issue?) > On Sat, 14 Jul 2001 00:44:25 -0400 (EDT) > Richard A Nelson <[EMAIL PROTECTED]> wrote: > > > On Fri, 13 Jul 2001, Roland Krocin wrote: > > > > > potato or woody? > > > I'm getting the same problems on 2 out of 3 woody boxes (sendmail). the > > > third works 70% of the time. reverse dns works perfectly to all other hosts. > > > other interesting thing is that this seems to be an issue mostly with > > > Microsoft-OS MTAs. There is a known problem with bind 9.x and MS DNS zone > > > transfers, that may have something to do with it... > > > > If you're having problems w/MTA -> M$ MTA (the original poster said > > telnet 25 had the same problem, so its not MTA->MTA) - and you're on > > 8.12, you may want to disable TLS negotiation (either on a host basis, > > or altogether). > > hello again, > > now what I can say: > > a) sure is not a MTA issue because telneting from this host to the other at port 25 also is blocked. > b) rblcheck doesnt show any blocks for my host. > c) no problem with dns config neither disk space or bandwich out of limits. > d) only some hosts blocks me to send email at them. > the remote email servers that blocks mine are using different systems: > > 220 X1 NT-ESMTP Server correo.servidoresdns.net (IMail 6.06 13762-1) > 220 mail1.telefonica.es ESMTP Service (Lotus Domino Release 5.0.5) ready at Sat, 14 Jul 2001 15:22:13 +0200 > > e) the only coincidence is that the remote hosts that blocks mine probably are using M$ dns server. > > f) i-m running potato with kernel 2.4.4 and with bind 8.2.3-0 on that server and I-ve been moving dns zones for more than 200 domains recently from an old primary dns server with bind to this one. > > g) remote admins tell me that they are not blocking my hosts and dns config are ok. > > what should I do ? > > Jaume Teixi > CTO > 6TEMS - Ducform, SA > http://www.6tems.com > > > -- > To UNSUBSCRIBE, email to [EMAIL PROTECTED] > with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED] > -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
