Emails being blocked by Symantec cloud - need help resolving

Hi

We are having emails from our domain blocked by several other companies using Symantec cloud.

Have checked the link provided by Symantec support but none of our MX records are showing as being blocked - how up to date is this?

We are clear on all other spam databases and our admin has checked the Exchange setup as per instructions.

Not keen to post IPs and domain names so would appreciate a PM from a Symantec employee to help resolve.

Looking forward to a quick resolution to this issue.