Problem sending e-mail to one domain

[webaltern]

Hi!

we are unable to send e-mail from our servers (yes from ALL our servers) to ******@swing.be ... We can send e-mail to any other host but not this one... But we can send e-mail to ******@swing.be with our Gmail without any problem.

The error we received is:

retry time not reached for any host after a long failure period

OR

retry timeout exceeded

our exim mainlog said:

2012-01-25 17:35:58 1Rq3x8-0000pR-4R <= [email protected] H=localhost.localdomain (ccnamur.be) [127.0.0.1] P=esmtpa A=login:[email protected] S=557 [email protected] T="test 123test" from <[email protected]> for ******@swing.be
2012-01-25 17:35:58 1Rq3x8-0000pR-4R ** ******@swing.be F=<[email protected]> R=lookuphost T=remote_smtp: retry time not reached for any host after a long failure period
2012-01-25 17:35:58 1Rq3x8-0000pU-B4 <= <> R=1Rq3x8-0000pR-4R U=mail P=local S=1408 T="Mail delivery failed: returning message to sender" from <> for [email protected]
2012-01-25 17:35:58 1Rq3x8-0000pR-4R Completed
2012-01-25 17:35:58 1Rq3x8-0000pU-B4 => test <[email protected]> F=<> R=virtual_user T=virtual_localdelivery S=1500

we can dig swing.be and the resolve from our server is:

; <<>> DiG 9.3.6-P1-RedHat-9.3.6-16.P1.el5_7.1 <<>> swing.be mx
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 44624
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;swing.be. IN MX

;; ANSWER SECTION:
swing.be. 1 IN MX 100 in.mx.skynet.be.

;; Query time: 37 msec
;; SERVER: 8.8.8.8#53(8.8.8.8)
;; WHEN: Wed Jan 25 17:37:26 2012
;; MSG SIZE rcvd: 55

so I think the server can see the other one... I have made an exim update but this didn't change anything... if anyone have a clue on this...

thank you!

sorry for my bad english, that's not my primary language....

 

[SeLLeRoNe]

Are you able to telnet in.mx.skynet.be on port 25 from those servers?

On my dig it reply:

;; ANSWER SECTION:
skynet.be.              600     IN      MX      10 in.mx.skynet.be.

And im able to telnet it on port 25, if you cant, for some reason your subnet should be banned from them.

Regards

 

[webaltern]

Well, i'm able to telnet but the server close the connexion

telnet in.mx.skynet.be 25
Trying 195.238.5.129...
Connected to in.mx.skynet.be (195.238.5.129).
Escape character is '^]'.
Connection closed by foreign host.

So I guest the only way to solve my problem is to try to contact skynet to see if our IPs are banned and if they are, what we can do to get it un-banned....

 

[SeLLeRoNe]

I dont think is a ban, in case of ban on firewall you neither was able to connect... but for sure there is something wrong

Contact them is maybe the only way to fix this issue, otherwise someone else with more ideas will reply.

Regards