Thanks for the reply. This was what I figured may be the case. The problem is that they [the recipient] deny the presence of any log entries showing rejection from our address.
I know the DNS entries are correct, I can send to the address from a number of remote emailers, but it will just not accept [or, apparently even acknowledge the existence of] our messages.
They say that they have opened all possible channels for our emails - these are vital commercial negotiations, and so I believe them here - but we still cannot get through. Are there any settings I can make in OUR dns records or IP settings that may correct the problem? Are there other tools that I can use to obtain a better diagnosis?
THanks again,
Michael
On 20/04/2012, at 3:19 PM, Piers Rowan wrote:
> stat=Deferred: Connection refused
>
> The other host is not accepting email.
>
> This could be because of reverse MX, the originating IP address being on a LAN and not a FQDN or some other measure THEY have in place.
>
> Ask them if the do reverse MX lookups or other anti spam measures.
>
> Cheers
>
> P
>
> On 04/20/2012 02:44 PM, Michael Gapper wrote:
>>
>>
>> I have been asked to investigate a problem with undeliverable emails.
>>
>> The problem is that email to a particular domain is not being sent but all other emails from the same server are apparently working correctly. The administrator of the receiving domain insists that our server is not handing the mail off correctly to the internet.
>>
>> Our set-up consists of a windows network using a windows 2003 server domain with a gateway server running Fedora 9 and using Sendmail 8.14.12. Both servers are due for replacement in the near future.
>>
>> Mail transport from Outlook on the windows network appears to have no problem using the mail server, only in the case of this one particular domain does delivery fail. I have tried sending an email to the "undeliverable" domain and cc'ing it to another external address. The message failed on one address but succeeded immediately on the other. The entry in the sendmail log is as follows:
>>
>>> Apr 19 11:51:03 gw sendmail[467]: q3J1p3w2000467: from=<Administrator(a)yyyyy.com.au>, size=1510, class=0, nrcpts=2, msgid=<64001D94702C3545B284436BFA4D2932457EAB(a)xxx.yyy.local>, proto=ESMTP, daemon=MTA, relay=[192.168.xx.xx]
>>> Apr 19 11:51:04 gw sendmail[470]: q3J1p3w2000467: to=<xxx(a)zzzz.com>, delay=00:00:01, xdelay=00:00:01, mailer=esmtp, pri=151510, relay=extmail.zzzz.com. [xx.x.xxx.xxx], dsn=2.0.0, stat=Sent (Message received: 20120419015104.WMYJ5617.nskntingx06p.mx.zzzz.com(a)gw.yyyy.com.au)
>>> Apr 19 11:51:07 gw sendmail[470]: q3J1p3w2000467: to=<AAA(a)BBBB.com>, delay=00:00:04, xdelay=00:00:03, mailer=esmtp, pri=151510, relay=BBBB.com.inbound15.CCCCC.net. [xxx.xx.xxx.xx], dsn=4.0.0, stat=Deferred: Connection refused by BBBB.com.inbound15.CCCCC.net
>>
>> dig finds the correct MX entries for the outside domain and traceroute has no problems locating the foreign server.
>>
>>
>> Any suggestions would be gladly received.
>>
>> Thanks
>>
>> Michael
>>
>>
>> _______________________________________________
>> luv-beginners mailing list
>> luv-beginners(a)lists.luv.asn.au
>> http://lists.luv.asn.au/listinfo/luv-beginners
>
> --
>
>
> Piers Rowan
> Director
>
> Tel: (+61) (0)8 7324 1004
> Mobile: (+61) (0)418 770 331
>
> <rol_logo.png>
> piers.rowan(a)recruitonline.com.au
> www.recruitonline.com.au
> <logo_linkedin_92x22.png> My Profile Join User Group
> Online Recruitment Software
Hi Duncan
I thought that may have been the case but any online checking I did came back negative. There is also the fact that this is a single domain that we cannot email to, there are no other bounces or fail to connects. The sending domain is roadgear.com.au just in case you can find any positive tests that I have missed!
The owners of the offending domain say that they have opened all of their firewall and anti spam blocks to allow our email address but that they cannot even see connection attempts hitting their servers. I have tried using the sending domain address in headers sent from another machine [not on the same domain] and have connected successfully. I have sent from the genuine domain to two different addresses and had one receipt and one failure and so I am confident that the sending machine is connecting successfully to at least part of the internet.
I am baffled; and since we are both saying that our systems appear to be operating normally with every other domain we are at some kind of impasse as far as troubleshooting goes.
cheers
Michael
On 22/04/2012, at 7:49 PM, Duncan16v wrote:
> Evening Michael,
>
> Just a thought: you haven't made your way inadvertently on to the spamhaus block list or something similar have you?
>
> Regards
> Duncan
>
> Sent from my iPhone
>
> On 22/04/2012, at 17:14, Michael Gapper <gapper(a)bigpond.com> wrote:
>
>> Thanks Trent but . . .
>>
>> If by your reply you mean that you cannot help unless all addresses are in plain text then perhaps you should say so.
>>
>> I would have thought that the structure of the log entry was important in its diagnosis, but if you feel that the specific addresses are vital to an understanding of the problem and think you can help more with a clear text version then I can provide one. All are obviously FQDN which seemed to be one point of contention.
>>
>> It is a beginners list and perhaps the"I TL;DR'd your post as soon as I saw the security-through-obscurity IPs." line deserves some explanation for those of us who admit to being beginners!
>>
>> cheers
>>
>> Michael
>>
>> On 22/04/2012, at 4:39 PM, Trent W. Buck wrote:
>>
>>> DR'd
>>
>> _______________________________________________
>> luv-beginners mailing list
>> luv-beginners(a)lists.luv.asn.au
>> http://lists.luv.asn.au/listinfo/luv-beginners
I have been asked to investigate a problem with undeliverable emails.
The problem is that email to a particular domain is not being sent but all other emails from the same server are apparently working correctly. The administrator of the receiving domain insists that our server is not handing the mail off correctly to the internet.
Our set-up consists of a windows network using a windows 2003 server domain with a gateway server running Fedora 9 and using Sendmail 8.14.12. Both servers are due for replacement in the near future.
Mail transport from Outlook on the windows network appears to have no problem using the mail server, only in the case of this one particular domain does delivery fail. I have tried sending an email to the "undeliverable" domain and cc'ing it to another external address. The message failed on one address but succeeded immediately on the other. The entry in the sendmail log is as follows:
> Apr 19 11:51:03 gw sendmail[467]: q3J1p3w2000467: from=<Administrator(a)yyyyy.com.au>, size=1510, class=0, nrcpts=2, msgid=<64001D94702C3545B284436BFA4D2932457EAB(a)xxx.yyy.local>, proto=ESMTP, daemon=MTA, relay=[192.168.xx.xx]
> Apr 19 11:51:04 gw sendmail[470]: q3J1p3w2000467: to=<xxx(a)zzzz.com>, delay=00:00:01, xdelay=00:00:01, mailer=esmtp, pri=151510, relay=extmail.zzzz.com. [xx.x.xxx.xxx], dsn=2.0.0, stat=Sent (Message received: 20120419015104.WMYJ5617.nskntingx06p.mx.zzzz.com(a)gw.yyyy.com.au)
> Apr 19 11:51:07 gw sendmail[470]: q3J1p3w2000467: to=<AAA(a)BBBB.com>, delay=00:00:04, xdelay=00:00:03, mailer=esmtp, pri=151510, relay=BBBB.com.inbound15.CCCCC.net. [xxx.xx.xxx.xx], dsn=4.0.0, stat=Deferred: Connection refused by BBBB.com.inbound15.CCCCC.net
dig finds the correct MX entries for the outside domain and traceroute has no problems locating the foreign server.
Any suggestions would be gladly received.
Thanks
Michael
