MX preference Problem (Full Version)

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diegov -> MX preference Problem (9/25/2008 6:50:24 AM)

Hi, when Merak send mail to domain with two or more MX servers with different preferences and the primary MX fails, It does not try to send the email to the next MX preference. Is there any way to configure Merak to try the next MX server in order to preference?

I saw this behaviour in merak 9.3.2 version.


Thanks!

Diego



marciohumpris -> RE: MX preference Problem (9/27/2008 3:19:13 AM)

Hello, Diego

Working fine for me. Let me show you the analysis, it might help you analyse and understand whats going on.

SYSTEM          [13FC] 09:06:14 Client session DNS query 'mx1.xxx.com' 0 (2) [OK - 3]
SYSTEM          [13FC] 09:06:14 Client session Connecting to 'mx1.xxx.com'
SYSTEM          [13FC] 09:06:35 Client session Could not connect to 'mx1.xxx.com(70.xx.xx.xx)'
SYSTEM          [13FC] 09:06:35 Client session Connecting to 'mx2.xxx.com'
64.235.44.240   [13FC] 09:06:35 Client session Connected
64.235.44.240   [13FC] 09:06:35 Client session <<< 220 mail.domain.com ESMTP IceWarp 9.3.2; Sat, 27 Sep 2008 09:06:36 -0300

So see, it does an MX query for a domain which I set 2 MX's for. One MX with lower priority 10 I pointed to an inexistant host. The other MX with priority 20 I pointed to an existing A HOST that points to another IceWarp Mail Server.

So 0 (2) [OK - 3]

0 means OK
(2) means it found 2 MX's
OK - 3 means the 3rd DNS server specified in IceWarp console (in Tools/Internet connections where you should specify more then 1 DNS server separated by semi colon) was used for the query. BTW, www.opendns.com has 2 DNS servers open for query that you can use.

Then it tries to connect to the lower MX. It is unable to, then it connections to the other MX with priority 20.

regards,
Marcio



diegov -> RE: MX preference Problem (10/1/2008 9:27:24 AM)

Thanks, We will search on my log to see why the email is undelivered.



marciohumpris -> RE: MX preference Problem (10/4/2008 2:26:12 AM)

Hi, Diego

Sure, my pleasure.

regards,
Marcio



corinthian -> RE: MX preference Problem (10/4/2008 7:19:08 AM)

Does anyone KNOW of the reasons when the lower priority server(s) would be used? Obviously if the server is unavailable or unresponsive, but what if the server returns a 4xx or 5xx response?  What does Merak do?  What does the RFC specify?

I haven't had issue but since it has been brought up, curiosity prevails.



marciohumpris -> RE: MX preference Problem (10/11/2008 2:13:23 AM)

Hi, Corinthian

Merak and other mail servers should keep trying to send the message according to what you specify in Mail Service/SMTP Service/Delivery.

regards,
Marcio



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