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Whitelist email getting held in mimecast

Email for Jira Cloud are getting held in mimecast at my organization.  I want to whitelist the domain and I assume I will need to IP as well.  As the cloud service IP is dynamic, how can I pin down the likely IP range to share with my IT department so that we can try whitelisting? 

1 answer

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Hello @Kyle,

Welcome to Atlassian Community!

Checking your email address on our tools, it found the following error:

550 Rejected by header based Anti-Spoofing policy: ...@... - https://community.mimecast.com/docs/DOC-1369#550 [3enCwxYXOc-gnksWziZInA.us593]

Please, whitelist our domains and IPs mentioned on the documentation below:

In case you also use Bitbucket and Trello, you can find the details on the following documentation:

Hope this helps!

Kind regards,
Angélica

Thanks so much @Angélica Luz!  I am trying to narrow the list. Can you tell me which Outgoing IPs from the list provided (https://support.atlassian.com/organization-administration/docs/ip-addresses-and-domains-for-atlassian-cloud-products/) are associated with the "*.atlassian.net" and "*.atlassian.com" domains respectively?



Hi Kyle,

It’s all of them. There are no specific IPs associated "*.atlassian.net" and "*.atlassian.com". When whitelisting the domains and IPs, it’s necessary to whitelist all of them to make sure the products work as expected.

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