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The company answered that 172.30.2.13 is an SMTP Relay Server. But the strange thing is that all the other mails sent from that application also use that SMTP Relay Server and that works fine...
In that case it may be that sendmail is configured to send all mail to the relay server without using the local name resolution system. This config is described here.
DSN is "delivery service notification".
These informations suggest it is the relay server that is generating the error message in the OP.
Are you able to find an MX record for isioux.nl using your DNS servers?
EDIT: I can:
Code:
c@CW8:~/d$ dig mx isioux.nl
; <<>> DiG 9.4-ESV-R5-P1 <<>> mx isioux.nl
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 44560
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 2, ADDITIONAL: 3
;; QUESTION SECTION:
;isioux.nl. IN MX
;; ANSWER SECTION:
isioux.nl. 86400 IN MX 10 mail.isioux.nl.
;; AUTHORITY SECTION:
isioux.nl. 86400 IN NS ns2.isioux.nl.
isioux.nl. 86400 IN NS ns1.isioux.nl.
;; ADDITIONAL SECTION:
mail.isioux.nl. 86400 IN A 77.95.99.119
ns1.isioux.nl. 83588 IN A 77.95.99.98
ns2.isioux.nl. 83588 IN A 77.95.97.185
;; Query time: 233 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Tue Jan 24 16:14:59 2012
;; MSG SIZE rcvd: 132
The mail isn't send through or own mailservers. The application is also hosted on another server outside our network. So it has nothing to do with our mailserver. That works fine.
In the past a manage-application is build for a company which has to send mails triggered by a cronjob. There are several different mails that are send from the application, each type triggered by a (different) cronjob of course
So let's say we have mail A with content A and mail B with content B. Mail A is sent to users C, D, E and F and mail B is sent to users G, H, I and J.
The system is able to send mail A but not to send mail B. Both mails are send through the SMTP Relay server (172.30.2.13 in this case), also the mails are sent directly to the recipients. How can this be solved? All necessary data I provided already earlier posts in this topic
Ok, so we know already the issue host not found etc. bladieblaat So is there maybe somebody who know's when and where is determined to use 172.30.2.13 as the name server is 172.30.2.40 from what I know... Or am I now just confusing 2 different things...
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