Plesk 360 email for the account verification is not received: recipient mail is being hosted under Office 365

Symptoms

Plesk 360 email for the account verification is not received

Note: Recipient mail is being hosted under Office 365

Cause

Office 365 detects and places emails to quarantine.

Resolution

Find and release messages that were quarantined instead of being delivered to you.
To see the spam-quarantined messages in quarantine, do the following:

1. Go to the quarantine page at https://protection.office.com/#/quarantine

2. Sign in using Office 365 credentials (user ID and password)

3. On the Quarantine page, there will be a list of any messages that were received, but were identified as spam and redirected to the quarantine.

   Note: It is possible to sort or search messages as needed.

4. Double-click a specific quarantined message to view details about it, and take actions.
   If the message wasn't actually spam, it is possible to release it (have it sent to the mailbox) and report it as not junk to the Microsoft Spam Analysis Team.
   Also, one or more messages might be selected, and then choose an action from the Actions drop-down list.