Error Messages


New Email
Running Outlook 2007
Windows 8.1
64 Bit
Outlook configured to imap.
was working perfectly one day then typical Microsoft the next.
No changes to system.

Error Message 1. Your message did not reach some or all of the intended recipients.

Subject: Test Message
Sent: 23/06/2014 6:48 AM

The following recipient(s) cannot be reached:' on 23/06/2014 6:48 AM
503 valid RCPT command must precede DATA

Error Message 2.
fail: Domain has exceeded the max emails per hour (150) allowed. Message discarded."

Error Message 3.
451 (check_mail)

Does anyone out there have any idea as to what could be causing these problems.

I have tried the authentication tick\untick
I have deleted then reinstalled the email address etc



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