Exchange error need some help please.
Below is an error I am getting from my clients when they try to send email to certain company's. It seems to be very random and only happens maybe once a week. I have checked the email in question and it seems fine to me.
451-4.4.0 Primary target IP address responded with: "554-p3pismtp01-027.prod.p
451-4.4.0 Primary target IP address responded with: "554-p3pismtp01-027.prod.p
Hi,
I suspect the mail domain of your client is blacklisted or considered as supcisous.
Go to the website: http://www.mxtoolbox.com/blacklists.aspx check wheter the daomin is blacklisted.
Hope this helps,
Shree
I suspect the mail domain of your client is blacklisted or considered as supcisous.
Go to the website: http://www.mxtoolbox.com/blacklists.aspx check wheter the daomin is blacklisted.
Hope this helps,
Shree
ASKER
The domain is not blacklisted. I checked.
ASKER
What is IMF? Sorry, I am not an exchange pro...lol
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ASKER
I'm using sbs 2008 and I have the EMC open but I don't see what your describing.
Here's an example of the same error (and I mean exactly the same) that was being caused by incorrect reverse DNS:
http://serverfault.com/questions/195863/exchange-2007-delivery-delayed-maybe-need-certificate
That may be worth looking into.
http://serverfault.com/questions/195863/exchange-2007-delivery-delayed-maybe-need-certificate
That may be worth looking into.
SBS 2008 has Exchange 2007, so IMF is built-in. With that said, IMF filters incoming mail, not outbound. This is definitely a case where the remote connection is rejecting mail due to a failed spam-check.
Blacklisting is the most likely culprit (yes, I know you say you checked), and the fact that you aren't seeing widespread rejections means that you are "clean" on most of the legitimate RBL operators, but there is a smaller RBL operator (or a few) that have blacklisted you. Contact the company with the recipient, speak with the IT staff member responsible for their mail services, and find out *specifically* which spam services they use.
From there you will know which companies to contact to get yourself de-listed.
-Cliff
Blacklisting is the most likely culprit (yes, I know you say you checked), and the fact that you aren't seeing widespread rejections means that you are "clean" on most of the legitimate RBL operators, but there is a smaller RBL operator (or a few) that have blacklisted you. Contact the company with the recipient, speak with the IT staff member responsible for their mail services, and find out *specifically* which spam services they use.
From there you will know which companies to contact to get yourself de-listed.
-Cliff
Hi,
Get in touch with the ISP to check your Reverse DNS pointing.
Also perform a SMTP test http://www.mxtoolbox.com/
Hope this helps,
Shree
Get in touch with the ISP to check your Reverse DNS pointing.
Also perform a SMTP test http://www.mxtoolbox.com/
Hope this helps,
Shree
if that works then its one of the list providers that you have in your filter causing it.
When i had this problem it was caused by a beta DB