Hi @renan_massaroto , welcome to the Community!
Our mail service received this error when trying to deliver the invitation email to your mail server:
550: 550 5.4.1 Recipient address rejected: Access denied. AS({hex}) [DM3NAM02FT023.eop-nam02.prod.protection.outlook.com]
According to the Office365 documentation for this particular error , it's likely a DNS misconfiguration causing this problem. You'll need to work with your domain's email administrator to resolve the problem, in Office365 and with your domain's DNS configuration. The linked document has some steps to go through and check to resolve the error.
Our mail service temporarily pauses sending new mail to email addresses when errors like this occur, in order not to flood the receiving mail server and to keep our mail service in good standing with spam detection services. I've cleared the pause for now - but you'll need to make sure the DNS problem is resolved before requesting another invitation email, or else our mail service might pause delivery to your email address again. If that happens, I will need to clear the pause again.
Cheers,
Daniel | Atlassian Support
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