- Subject: Action Required : You Have Undelivered/Pending
Microsoft-online server Detected you have  undelivered clustered mails on the 28th of
January. 2018, which are awaiting approval to be delivered
please not that this may cause mailbox malfunctions please follow instruction below:
1. Proceed to Release pending messages to Inbox
2. Proceed to Mail Server Cleaning with Microsoft-online Cloud server.