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Message could not be sent because smtp.live.com rejected the sender’s email address, error 0x800CCC78

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Archived post from November 16, 2016. Product: Windows Live Mail – no longer developed by its maker. Details may be out of date.

Question asked on Nov 16, 2016
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Hi Firedog,

I also have this similar error try to get this help for a week already. Please have look for error msg

The message could not be sent because the server rejected the sender's email address. The sender's email address was *** Email address is removed for privacy ***'.

Subject 'test'
Server Error: 550
Server Response: 550 5.7.3 Requested action aborted; user not authenticated
Server: 'smtp.live.com'
Windows Live Mail Error ID: 0x800CCC78
Protocol: SMTP
Port: 587
Secure(SSL): Yes

Incoming server is ok but not outgoing server. Please share for any help in this issue.

Thank you.

Regards,

Nick

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