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rnyk82

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hi guys i am having problem sending mail to xxx<_at_>yahoo.com.sg, and yahoo.com

but other doamin name are fine... currently using 6.2.2 beta version... please advise... before i can get a license from kerio...
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rnyk82

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hi sorry not beta version it a trial version... thanks...
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Pavel Dobry (Kerio)

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What kind of problem do you have?
Does the receiving server return some error?
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rnyk82

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Example i have send a mail to xxx<_at_>yahoo.com.sg or xxx<_at_>yahoo.com
it will return somehow return

Your message did not reach some or all of the intended recipients.

Subject:

The following recipient(s) could not be reached:

tws0511<_at_>yahoo.com.sg on 26-Oct-06 4:28 PM
mx4.mail.yahoo.com: Failed (Host not found)

below is the log report,

[26/Oct/2006 16:28:28] Recv: Queue-ID: 454071ac-00000035, Service: DSN, From: <>, To: <raymond<_at_>sgoceanus.com>, Size: 2046, Report: failed
[26/Oct/2006 16:28:28] Sent: Queue-ID: 454071a9-00000034, Recipient: <tws0511<_at_>yahoo.com.sg>, Result: failed, Status: 5.4.4 Host not found

but sometime when i send a mail to xxx<_at_>yahoo.com.sg, it actually when throught, this problem happen very frequenly, i not sure if any of my setting in my kerio is wrong or is there connection problem.

one thing i would like to stress, if i sending mail to hotmail or other domain the mail will be delivered...

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Pavel Dobry (Kerio)

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It seems the problem is in your DNS server.

Domain yahoo.com.sg has only 3 receiving mailservers (mx1,mx2 and mx3). There is no mx4.mail.yahoo.com, so the answer from DNS server is not correct:

> yahoo.com.sg
Server:  dns.domain.local
Address:  192.168.10.10

Unauthorized answer:
yahoo.com.sg    MX preference = 1, mail exchanger = mx2.mail.yahoo.com
yahoo.com.sg    MX preference = 1, mail exchanger = mx3.mail.yahoo.com
yahoo.com.sg    MX preference = 5, mail exchanger = mx4.mail.yahoo.com
yahoo.com.sg    MX preference = 1, mail exchanger = mx1.mail.yahoo.com

yahoo.com.sg    nameserver = ns5.yahoo.com
yahoo.com.sg    nameserver = ns1.yahoo.com
yahoo.com.sg    nameserver = ns2.yahoo.com
yahoo.com.sg    nameserver = ns3.yahoo.com
yahoo.com.sg    nameserver = ns4.yahoo.com
mx1.mail.yahoo.com      internet address = 4.79.181.14
mx1.mail.yahoo.com      internet address = 4.79.181.15
mx1.mail.yahoo.com      internet address = 4.79.181.168
mx1.mail.yahoo.com      internet address = 67.28.113.19
mx1.mail.yahoo.com      internet address = 67.28.113.73
mx2.mail.yahoo.com      internet address = 67.28.113.72
mx2.mail.yahoo.com      internet address = 4.79.181.135
mx2.mail.yahoo.com      internet address = 4.79.181.136
mx2.mail.yahoo.com      internet address = 4.79.181.168
mx2.mail.yahoo.com      internet address = 67.28.113.70
mx3.mail.yahoo.com      internet address = 67.28.113.10
mx3.mail.yahoo.com      internet address = 67.28.113.71
mx3.mail.yahoo.com      internet address = 67.28.113.74
mx3.mail.yahoo.com      internet address = 4.79.181.134
mx3.mail.yahoo.com      internet address = 4.79.181.168
ns1.yahoo.com   internet address = 66.218.71.63
ns2.yahoo.com   internet address = 68.142.255.16
ns3.yahoo.com   internet address = 217.12.4.104


Check your DNS server by commands:
nslookup
set type=MX
yahoo.com.sg
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rnyk82

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Hi true enought my nslookup has no mx4, can i ask how can i resolve this and why kerio mail server is looking for mx4 to send mail to yahoo...
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