Most high number error codes are generated by adding the appropriate error
number to -19000. That would mean that you are getting a 400 error. Here's
one description:
"Bad request 400
The request had bad syntax or was inherently impossible to be satisfied."
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http://www.w3.org/Protocols/HTTP/HTRESP.html>
Are you sure you have everything set up correctly in your account settings?
What kind of mail account are you using? What kind of mail server is
running?