Sent emails bounce back.

Question

Hello, my email was hacked several months. I have a vanity email and have attempted to correct the problem with Go Daddy the service provider. I am having problems sending emails. This is the message I receive when my sent email bounces back:

Remote server returned '550 5.7.705 Service unavailable. Access denied, tenant has exceededthreshold. For more information please go to http://go.microsoft.com/fwlink/?LinkId=526653 S(7136) [DM6PR12MB4944.namprd12.prod.outlook.com 2024-01-14T23:07:26.967Z 08DC14C9EBE22153]'

Answer 1

Hi Ramona,

Thanks for contacting us and sorry for the inconveniences,

Answer by Qian Zhang MSFT in the thread https://answers.microsoft.com/en-us/outlook_com/forum/all/550-57705-service-unavailable-access-denied-tenant/f52b6455-f57e-44b6-8e1f-161109fb6874 "To fix this, kindly follow procedures listed here in https://docs.microsoft.com/en-us/office365/troubleshoot/antispam/tenant-has-exceeded-threshold#resolution Below is an excerpt:

1. Remove any unknown or unused inbound connectors from Office 365. Click Resolution for detailed steps.
2. Check the audit logs to determine whether a connector was created recently. See reference: Auditing in Office 365 (for Admins).
3. Because an admin account was compromised, change the passwords for all your admins.
4. To prevent future compromise, enable multi-factor authentication (MFA) for, at least, the admin accounts. Click Resolution for related link.
5. Contact Microsoft Support to unblock the tenant"

Let me know if this helps or if you need further assistance.

Regards, Sola

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