0x8004210E

[Ryan & Dale 8]

Help

Message states the following:

Task 'mail.comcast.net-Receiving' reported error
(0x8004210E): Your mailbox is temporarily unavailable
because another email message is being delivered to it or
another mail application is accessing it. The server
responded; ERR box locked

 

[Robert Crayk]

Are you trying to access the mailbox from elsewhere, if not then I would
contact the ISP