Microsoft Office outlook

[minty]

Microsoft Office outlook -0x8004210E -ERR(IN USE) unable to mail drop

Since yesterday I have had problems with my incoming emails. I cannot receive them. The status bar sticks at 50% and eventually crashes out. The error given states that there is another email server being used or open and it cannot send my mail. There is no other account open. I have tried through Orange mail and can receive my emails there but cannot move any or delete any. The same thing happens mail server is busy.
My pc seems to have gone funny also and I am finding alot of programs are not responding. I do have CA Security installed and is all enabled.
If anyone can help please do.

I have just received this message

0x8004210E -ERR(IN USE) unable to mail drop

 

[JMH]

Hi minty,
Contact your ISP and tell them the error message you are getting.
They should be able to see if the mailbox is locked for said condition (meaning a
new message is being delivered or the server doesn't let two, or pop3 clients
check at the same time) and clear it for you.

Let us know how it goes.