dyna.spamrats.com fails 550 Global Policy Error when sending email to some recipients from a .local domain

Sometimes when we send an email if fails
- Remote Server at ABC.org.uk (2001:1420::25:4) returned '451-4.4.0 Primary target IP address responded with: "550-Global Policy Restriction: Dynamic IP Address - dyna.spamrats.com: 451-4.4.0 550-SPAMRATS IP Addresses See: http://www.spamrats.com/bl?81.X.Y.Z 451 4.4.0 550 (" Attempted failover to alternate host, but that did not succeed. Either there are no alternate hosts, or delivery failed to all alternate hosts. The last endpoint attempted was 2001:1420::25:4:25'

I wonder if this is because the Exchange 2013 Server domain was migrated from SBS and has both a .local (internal)and .com domain (external)

When I look at the diagnostic within an email is states it is from the .local domain.
Received: from mail.domain.local (192.X.Y.Z)

Could this be the problem? How do I stop Exchange 2013 advertising as mail.domain.local and instead show mail.domain.com

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Jason CrawfordTransport NinjaCommented:
You'll want to configure your Send Connectors to advertise the .com domain by using the -Fqdn parameter:



Get-SendConnector | Set-SendConnector -Fqdn mail.domain.com

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EICTAuthor Commented:
Hi Keyser,
Thanks for your reply. I have done this but the problem still exists. Do I need to change the scope of the send connector from * to domain.com ?

EICTAuthor Commented:
In the end I contacted spam rats and they were able to unregister the connection as spam.

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EICTAuthor Commented:
I was able to resolve this by contacting spam rats
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