Solved

#5.5.0 smtp;550-Verification failed

Posted on 2009-05-16
7
1,453 Views
Last Modified: 2012-05-07
We are using exchange 2003 with google postini mail security for incoming mails. We have postini mail servers in the MX record with higher prefrence. For out going mails we are using our own smtp server. all is working well except some domains are not accepting mails from our domain, message bounced back with "#5.5.0 smtp;550-Verification failed " error. Our domain name is mabanisteel.com and the mail server host is mail.mabanisteel.com.

Please help as this issue becomes very critical for us.

Thanks in advance

Faisal  
0
Comment
Question by:FaisalYameen
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 3
  • 3
7 Comments
 
LVL 65

Expert Comment

by:Mestha
ID: 24402294
What many sites will do is attempt to call back to the server that is sending the message to verify that it is valid. The idea being that a BOT would not respond. If you have restricted the server down to accept email from Postini (Which is what they tell you to do) then this test would fail.

Your best option would be to route email out through the same service that they come in, then these tests would be a success.

Simon.
0
 
LVL 17

Expert Comment

by:Suraj
ID: 24403166
Is this happening for one domain or all the external domains?
did u try to telnet to that domain on port 25?
whats the result?
is it showing you banner or is it dropping the connection?
whats your exchange server?  2003 or 2007?
0
 
LVL 17

Expert Comment

by:Suraj
ID: 24403172
sorry for the last question...
since its  2003 ,, go to properties of default smtp virtual server
and enable the logging... select.. NCSA log format..
restart the smtp service...
try doing the telnet again

i am waiting for your response....
0
Office 365 Training for Admins - 7 Day Trial

Learn how to provision tenants, synchronize on-premise Active Directory, implement Single Sign-On, customize Office deployment, and protect your organization with eDiscovery and DLP policies.  Only from Platform Scholar.

 

Author Comment

by:FaisalYameen
ID: 24403196
Thanks Simon for your reply, we will try this option and will let you know the results.

Faisal

0
 

Author Comment

by:FaisalYameen
ID: 24403643
It is happening with some domains only, OK I have enable the logging with NCSA format please see the telnet results after that

220-boat.securenet-server.net ESMTP Exim 4.69 #1 Sat, 16 May 2009 15:11:54 -0400

220-We do not authorize the use of this system to transport unsolicited,
220 and/or bulk e-mail.
helo gulfconsultae.com
250 boat.securenet-server.net Hello mail.mabanisteel.com [213.42.17.84]
mail from:faisal.yameen@mabanisteel.com
250 OK
rcpt to:supervision@gulfconsultae.com
550-Verification failed for <faisal.yameen@mabanisteel.com>
550-Previous (cached) callout verification failure
550 Sender verify failed



0
 
LVL 17

Accepted Solution

by:
Suraj earned 500 total points
ID: 24403947
This is not your exchange issue. its the remote domain's issue.
This issue is usually caused when you have a POSTFIX or Exim server on the other end. They have a known compatibility issue as explained by some here. The best way to get this resolved is to speak to the other admin to make the adjustments in Postfix/Exim. It is not an issue with Exchange Server

Also check it:
http://www.experts-exchange.com/Networking/Email_Groupware/Exchange_Server/Q_21714486.html

-x-sam-
0
 

Author Comment

by:FaisalYameen
ID: 24409856
Thanks X-Sam I am contacting the admin on other side hope this will be resolved then.

Faisal Yameen
0

Featured Post

On Demand Webinar - Networking for the Cloud Era

This webinar discusses:
-Common barriers companies experience when moving to the cloud
-How SD-WAN changes the way we look at networks
-Best practices customers should employ moving forward with cloud migration
-What happens behind the scenes of SteelConnect’s one-click button

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Lotus Notes – formerly IBM Notes – is an email client application, while IBM Domino (earlier Lotus Domino) is an email server. The client possesses a set of features that are even more advanced as compared to that of Outlook. Likewise, IBM Domino is…
After hours on line I found a solution which pointed to the inherited Active Directory permissions . You have to give/allow permissions to the "Exchange trusted subsystem" for the user in the Active Directory...
how to add IIS SMTP to handle application/Scanner relays into office 365.
A short tutorial showing how to set up an email signature in Outlook on the Web (previously known as OWA). For free email signatures designs, visit https://www.mail-signatures.com/articles/signature-templates/?sts=6651 If you want to manage em…

734 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question