Mail Delivery Fails upon Migration to new Data Center

Hey All,

In the last 3 weeks, we moved our exchange server to our new data center.  We took care of the A record and reverse DNS records being updated to reflect the new IP Address of our mailq server.  We don't have any issues with a majority of email address; however, we get bounce backs from optimum and aol email address.  Here is what the mailer-daemon message looks like that we receive back...

Delivery has failed to these recipients or groups:
xxx@optimum.net
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: mx1.optimum.net.

Then this is further down in that same message:

Rule breakdown below
       pts rule name              description
      ---- ---------------------- --------------------------------------------------
      0.00 EXTRA_MPART_TYPE       Header has extraneous Content-type:...type= entry
      0.00 HTML_MESSAGE           BODY: HTML included in message

Anyone have any idea why this would be happening?  We are currently at a loss and don't know where to go next.

Than you.

-Anthony
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Anthony6890Asked:
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Hypercat (Deb)Commented:
Is there a transport rule that adds a signature or logo to the emails, or maybe a local signature block for some users that includes a logo?  It looks like the mail is being rejected because of some content in the body.

Also, do you have an SPF record and did that get changed appropriately if required?
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Anthony6890Author Commented:
There aren't any transport rules for signatures.  I tried sending an email with no signature at all, and it still comes back.  

We do not have an SPF record.  

The interesting thing is that when we send an email "secured" meaning the email goes to the Barracuda cloud and then a notification goes to the recipient that they have a secured message, that whole process works without issue.
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Anthony6890Author Commented:
We ended up having AOL assist in getting the resolve on their end; however, we still are at a loss with Optimum.  It looks like it's a bigger issue that anticipated with them.
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Anthony6890Author Commented:
There wasn't an effective solution, so we had to reach out to one of the vendors directly for help.
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