Cannot receive emails even though MX entries are ok

Cannot receive emails even though MX entries are ok

Hello,

I cannot receive emails for my domain obolus.io even though the MX settings are ok according to mtoolbox.com

If I sent an email to one of my addresses I receive the following reply:

The response from the remote server was:
550 The mail server could not deliver mail to **********@obolus.io. The account or domain may not exist, they may be blacklisted, or missing the proper dns entries.

Please advice.

Thanks!

Dom