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issue with new ISP using our email server

Using SBS2011 with Exchange 2010
We changed ISP so our IP address changed
I did the changes to our firewall and our MX and A records
I also had our new provider do a rDNS for our email server

I remember back in SBS 2003 if I had any changes on our ISP or firewall
I would need to run a wizard on SBS2003 to fix email which would look at my firewall then prompt me for the new ISP DNS IP Address. After this email would work just fine.

Do I need to do something like this in SBS 2011?

here is an example of our emails bouncing back:

VA3EHSMHS009.bigfish.com rejected your message to the following e-mail addresses:
(username@dot.ca.gov) <mailto:username@dot.ca.gov>

VA3EHSMHS009.bigfish.com gave this error:
Service unavailable; Client host [xx.xx.xxx.xxx] blocked using Blocklist 1, mail from IP banned; To request removal from this list please forward this message to delist@messaging.microsoft.com and include your ip address xxx.xxx.xxx.xxx

this happens to some of our clients not all
1 Solution
Suliman Abu KharroubIT Consultant Commented:
Seems that the IP addrss that provided by thhe new iap is alrady blackisted...check it on http://mxtoolbox.com

If so, ask them to provide another clean one
jsarinanaAuthor Commented:
it's not a black list issue, thanks for the help

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