问题 提问于 2018年8月7日
I changed from POP server setting to iMAP as service provider required it. I can now receive messages but not send them
I now get the following message:
'The message could not be sent because the server rejected the sender's email address.'
Subject: 'Final status report"
Server error: 550
Server response: 550 5.1.0 Authentication required
Windows live mil error ID: 0x800CCC78
Protocol: SMTP
Port 465
Secure(SSL): Yes
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