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What Meaning and follow "550 Message does not pass DomainKeys requirements for domain ..."

Posted on 2012-03-18
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Last Modified: 2012-04-30
Hi,

I'm got my email recipient similiar feedback when they send email to me.
"550 Message does not pass DomainKeys requirements for domain ..."

Have any command or method to verify above mentioned reason - "Our email server check the sender email server" Acutally, the sender can email to me throug Gmail. Is say Gmail system will not applied this "Checking" setup

Tahnks...samuel
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Question by:SamuelLam1997
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Dave Baldwin earned 1500 total points
ID: 37736207
Read here http://en.wikipedia.org/wiki/DomainKeys   Yahoo uses it to detect and delete spam as do some others.
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Author Comment

by:SamuelLam1997
ID: 37736445
Hi
May I to know the solution method, either on our server side ir other way.
Thanks.

Samuel
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LVL 84

Expert Comment

by:Dave Baldwin
ID: 37736494
The error message is telling you that your domain was not verified for some reason.  Go to http://www.mxtoolbox.com/ and enter the domain name that is used to send your email.  You will get a lot of information about it like whether it is listed as a source of spam.  Check for SPF.  If you don't have it, go to http://www.microsoft.com/mscorp/safety/content/technologies/senderid/wizard/ and create it to put in your nameserver records.  Fix any other mail server problems you find at http://www.mxtoolbox.com/
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Author Comment

by:SamuelLam1997
ID: 37736566
Hi, Dave

Could you help me to varify the email server for  "traveller.com.hk". user can't send email through this server to our emails server "cttlhk.com"

The sender will got email response '550 Message does not pass DomainKeys requirements for domain "

Thanks for your kindly helping.

Samuel
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LVL 84

Expert Comment

by:Dave Baldwin
ID: 37736674
The only discrepancy I found was that the PTR record did not return your domain name.  It comes back with 236.233.86.203.pacdns.com .  Everything else looks just my domain name.
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Author Comment

by:SamuelLam1997
ID: 37736692
Hi, Dave

I'm not experienced on you mentioned statement. Could you tell the reason which why user can't send email throu traveller.com.hk  to our domain cttlhk.com.

Thanks a lot.

samuel
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LVL 84

Expert Comment

by:Dave Baldwin
ID: 37736881
Because of this:

220 hkitec.net ESMTP
OK - 203.86.233.236 resolves to 236.233.86.203.pacdns.com
Warning - Reverse DNS does not match SMTP Banner

'hkitec.net' in the initial 'banner' does not match the Reverse DNS of 236.233.86.203.pacdns.com  they need to fix that.
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LVL 84

Expert Comment

by:Dave Baldwin
ID: 37736887
And your domain has the same problem.

220 cttlhk.com ESMTP MDaemon 9.5.6; Mon, 19 Mar 2012 17:32:27 +0800

 OK - 218.189.175.58 resolves to citizenthunderbird.com
 Warning - Reverse DNS does not match SMTP Banner
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