the email is this:
You have received 7 new unsent messages
As stated in the terms of the 22.3 service agreement, the domain administration has prevented new emails from entering its system from 9/14/20 to 5:42:55 UTC UTC for non-compliance with privacy policies.
If you want to continue resolving this error, you can choose to exclude or resume message retention.
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If you do not take any action within 24 hours, the messages will be permanently deleted.
Any idea??thank you
Sound like a spam/phishing email.
If you are not sure then check with your email provider (that's not roundcube).