My Windows Mail has sunddenly stopped sending. I am recieving mail OK but can't send. I get the following error message:
Account: 'mail.btinternet.com', Server: 'mail.btinternet.com', Protocol: SMTP, Server Response: '451 See http://pobox.com/~djb/docs/smtplf.html.', Port: 587, Secure(SSL): No, Server Error: 451, Error Number: 0x800CCC6A
Any ideas?
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