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kolathaya123Flag for India

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mail Delivery issue with error #5.7.1 smtp; 554 5.7.1 9.9.9> #SMTP#

Hi,

I have exchange 2010 and smtp server IMSS. I have a problem with one mail. The user send a mail to one customer and it got bounced back with error msg.
Your message wasn't delivered due to a permission or security issue. It may have been rejected by a moderator, the address

may only accept e-mail from certain senders, or another restriction may be preventing delivery.

The following organization rejected your message: smtp.secureserver.net.

It is not only to one customer, if we send this particular mail to any domain, gmail, yahoo, rediff, we will get same bounce back msg.

Then we changed the Public IP of SMTP server with another which we had. From there it goes fine.

So what may be the issue. only one mail not going to any domain with one particular public IP. All other mails going to all domain with same public IP
Avatar of Vijaya Babu Sekar
Vijaya Babu Sekar
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Might public ip has been listed in RBL (Real time Block list) that is the reason mail has been rejected by destination server.

you can check the problematic public ip address in http://mxtoolbox.com/blacklists.aspx


you may see the block list type
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Bruno PACI
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