[SLUG] MX problem ?
one of my users received a reject from an attempted inbound mail as below, I'm a bit perplexed as to where from is remote mail server looking for host autopack.com.au ? domain's mx is 'bilby.sbt.net.au', and, there is no probs that I can see, any thoughts ? -- BELOW IS THE REJECT INFO RECEIVED ON MY LAST JUNE 4th EMAIL. -Mensaje original- De: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Enviado el: Miércoles, 04 de Junio de 2008 02:27 p.m. Para: [EMAIL PROTECTED] Asunto: failure notice Hi. This is the qmail-send program at smtpauth19.prod.mesa1.secureserver.net. I'm afraid I wasn't able to deliver your message to the following addresses. This is a permanent error; I've given up. Sorry it didn't work out. [EMAIL PROTECTED] : Sorry, I couldn't find any host named autopack.com.au?. (#5.1.2) --- Below this line is a copy of the message. Return-Path: [EMAIL PROTECTED] Received: (qmail 26989 invoked from network); 4 Jun 2008 19:26:39 - Received: from unknown (189.136.82.223) by smtpauth19.prod.mesa1.secureserver.net (64.202.165.30) with ESMTP; 04 Jun 2008 19:26:35 - From: [EMAIL PROTECTED] To: [EMAIL PROTECTED] Date: Wed, 4 Jun 2008 14:26:32 -0500 Message-ID: !~!UENERkVCMDkAAQACABgAWysQ9l1+r0mcZsASN2XkacKAA [EMAIL PROTECTED] MIME-Version: 1.0 Content-Type: multipart/alternative; boundary==_NextPart_000_0011_01C8C64E.FEA739A0 X-Mailer: Microsoft Office Outlook, Build 11.0.5510 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3198 Thread-Index: Aci7nV6DI++cuRxgTEa5A4+5FzHm6QK2296A In-Reply-To: [EMAIL PROTECTED] Disposition-Notification-To: [EMAIL PROTECTED] This is a multi-part message in MIME format. -- -- Voytek -- SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html
Re: [SLUG] MX problem ?
On Tue, Jun 10, 2008, Voytek Eymont wrote: one of my users received a reject from an attempted inbound mail as below, I'm a bit perplexed as to where from is remote mail server looking for host autopack.com.au ? domain's mx is 'bilby.sbt.net.au', and, there is no probs that I can see, any thoughts ? Likely a spammer forging your user's address in the Envelope-From. The sequence goes something like this: - spamming server connects to recipient server and claims to be sending mail from your user[1] - recipient server realises that the recipient address doesn't exist and rejects it - if this rejection cannot be passed live back to the sending server, a bounce mail is generated and sent to the *claimed* sender This is particularly common with qmail, I understand, because (at least when I last used it) it does not reject mail during a live SMTP transaction with the sending server, but rather accepts mail and then sends out bounces in a second transaction. It's possible with other mail programs if there were several servers in the sending sequence, the last of them gets the live reject but does not still have a connection to the server that sent to it, so it generates a bounce. Anyway, there's not a lot you can do about it as neither the spamming server nor the recipient server are under your control, except subject bounce messages to spam filtering. -Mary [1] By default, this is totally acceptable in SMTP, any server can send mail claiming to be from any person. -- SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html
Re: [SLUG] MX problem ?
Hi all, On Tue, 10 Jun 2008 07:44:45 +1000 (EST) Voytek Eymont [EMAIL PROTECTED] wrote: one of my users received a reject from an attempted inbound mail as below, I'm a bit perplexed as to where from is remote mail server looking for host autopack.com.au ? domain's mx is 'bilby.sbt.net.au', and, there is no probs that I can see, any thoughts ? -- BELOW IS THE REJECT INFO RECEIVED ON MY LAST JUNE 4th EMAIL. -Mensaje original- De: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Enviado el: Miércoles, 04 de Junio de 2008 02:27 p.m. Para: [EMAIL PROTECTED] Asunto: failure notice Hi. This is the qmail-send program at smtpauth19.prod.mesa1.secureserver.net. I'm afraid I wasn't able to deliver your message to the following addresses. This is a permanent error; I've given up. Sorry it didn't work out. [EMAIL PROTECTED] : Sorry, I couldn't find any host named autopack.com.au?. (#5.1.2) One thing I can see here is the space at the end of the address, which then ends up looking like autopack.com.au? Notice the ? This may be the problem. -- Regards Mick Pollard ( lunix ) BOFH Excuse of the day: Legacy Backplane Overflow pgptZ3pu97lnL.pgp Description: PGP signature -- SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html
Re: [SLUG] MX problem ?
Mick, thanks, I think you spotted something, I'll check that ___ Sent with SnapperMail www.snappermail.com .. Original Message ... On Tue, 10 Jun 2008 10:17:02 +1000 [EMAIL PROTECTED] : Sorry, I couldn't find any host named autopack.com.au?. (#5.1.2) One thing I can see here is the space at the end of the address, which then ends up looking like autopack.com.au? Notice the ? This may be the problem. -- SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html
[SLUG] MX problem with sendmail
Can someone remind me what the fix is for the following sendmail error: 553 some.domain.com. config error: mail loops back to me (MX problem?) I know it is in the bat book somewhere, but I just cannot find it. Howard. LANNet Computing Associates http://lannetlinux.com "...well, it worked before _you_ touched it!" -- SLUG - Sydney Linux User Group Mailing List - http://slug.org.au/ More Info: http://slug.org.au/lists/listinfo/slug
Re: [SLUG] MX problem with sendmail
On Mon, Jan 15, 2001 at 01:15:18PM +1100, Howard Lowndes wrote: Can someone remind me what the fix is for the following sendmail error: 553 some.domain.com. config error: mail loops back to me (MX problem?) http://www.sendmail.org/faq/section4.html#4.5 Cheers, John -- whois [EMAIL PROTECTED] -- SLUG - Sydney Linux User Group Mailing List - http://slug.org.au/ More Info: http://slug.org.au/lists/listinfo/slug
Re: [SLUG] MX problem with sendmail
Can someone remind me what the fix is for the following sendmail error: 553 some.domain.com. config error: mail loops back to me (MX problem?) I know it is in the bat book somewhere, but I just cannot find it. google search: "mail loops back to me" site:sendmail.org http://www.sendmail.org/faq/section4.html#4.5 I'm getting these error messages: 553 MX list for domain.net points back to relay.domain.net 554 [EMAIL PROTECTED]... Local configuration error How can I solve this problem? You have asked mail to a domain (e.g., domain.net) to be forwarded to a specific host (in this case, relay.domain.net) by using an MX record, but the relay machine doesn't recognize itself as domain.net. Add domain.net to /etc/mail/local-host-names [known as /etc/sendmail.cw prior to version 8.10] (if you are using FEATURE(`use_cw_file')) or add "Cw domain.net" to your configuration file. There are a couple of additional cases where you don't actually want local delivery, and thus adding domain.net to class w is not the right fix: 1) When relay.domain.net should just be acting as a forwarder, e.g. a firewall/gateway box. The proper fix could be to set up a mailertable entry for domain.net. 2) When relay.domain.net is a secondary (etc.) MX, and the MX mistakenly points to a CNAME or other "non-canonical" name [this gives "config error: mail loops back to me (MX problem?)"]. The proper fix is to point the MX at the actual name, a "work-around" to add the MX target to class w. hth marty -- SLUG - Sydney Linux User Group Mailing List - http://slug.org.au/ More Info: http://slug.org.au/lists/listinfo/slug
Re: [SLUG] MX problem with sendmail
Tks for the reponses. It was in /etc/sendmail.cw and has now moves to /etc/mail/local-host-name. Quoting Howard Lowndes [EMAIL PROTECTED]: Can someone remind me what the fix is for the following sendmail error: 553 some.domain.com. config error: mail loops back to me (MX problem?) I know it is in the bat book somewhere, but I just cannot find it. Howard. LANNet Computing Associates http://lannetlinux.com "...well, it worked before _you_ touched it!" -- SLUG - Sydney Linux User Group Mailing List - http://slug.org.au/ More Info: http://slug.org.au/lists/listinfo/slug Howard. LANNet Computing Associates http://lannetlinux.com "...well, it worked before _you_ touched it!" -- SLUG - Sydney Linux User Group Mailing List - http://slug.org.au/ More Info: http://slug.org.au/lists/listinfo/slug
