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01.29.2006 at 08:43AM PST, ID: 21714486
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#5.5.0 smtp;550-Verification failed

Asked by rafimt in Exchange Email Server

Tags: failed

When any of our e-mail users try to send an e-mail to some specific domain (eg. asd@qwe.com.ty ), immediately get an undeliverable message with the following error.

There was a SMTP communication problem with the recipient's email server.  Please contact your system administrator.
 <mail.xyz.com.ab #5.5.0 smtp;550-Verification failed for <123@xyz.com.ab>>

I check both Dns (mx) and telnet tests. I also run test through http://www.dnsreport.com/ . Results are fine.
We can send mail to this problematic address from hotmail or yahoo mail.
Internal e-mail users can send mails to all external address except the problematic domains.
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[+][-]01.29.2006 at 09:14AM PST, ID: 15817901

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[+][-]01.29.2006 at 09:38AM PST, ID: 15817981

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[+][-]01.29.2006 at 09:43AM PST, ID: 15818001

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[+][-]01.29.2006 at 09:45AM PST, ID: 15818012

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[+][-]01.29.2006 at 11:08AM PST, ID: 15818472

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[+][-]01.29.2006 at 11:19AM PST, ID: 15818529

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[+][-]01.29.2006 at 09:23PM PST, ID: 15821419

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[+][-]01.30.2006 at 04:04AM PST, ID: 15822867

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About this solution

Zone: Exchange Email Server
Tags: failed
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Solution Provided By: Quetzal
Participating Experts: 2
Solution Grade: B
 
 
[+][-]01.30.2006 at 09:44AM PST, ID: 15825609

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[+][-]01.30.2006 at 10:55AM PST, ID: 15826276

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[+][-]01.30.2006 at 12:10PM PST, ID: 15827121

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[+][-]01.30.2006 at 05:32PM PST, ID: 15829902

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[+][-]01.31.2006 at 09:11AM PST, ID: 15835448

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[+][-]02.01.2006 at 08:30PM PST, ID: 15850423

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