in outlook /tools /accounts /properties .not sure if you will find the problem there because it should be setup pop -smtp default
caperjack
I hate 20 Questions
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The POP-before-SMTP authentication scheme usually has a time limit associated with it. If you haven't authenticated to the POP server (by checking your mail) within the specified timeout window, you may get the 550 error. The next time it happens, try checking your mail first and then resend the message.
DMR
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