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Error Code: 0x800CCC6F

Similar Symptoms:
 
An unknown error has occurred. Subject 'the subject', Account: 'mail.xxxx.com', Server: 'mail.xxxx.com', Protocol: SMTP, Server Response: 骂 mail server permanently rejected message (#5.3.0)', Port: 25, Secure(SSL): No, Server Error: 554, Error Number: 0x800CCC6F
 
 
Possible Causes:
 
1) Sender was trying to send a blocked file (such as .exe, .lnk, or .vbs, etc)

2) Sender was trying to send / forward an email which has been detected as a high potential spam mail
3) Sender was trying to send a virus email

Resolution:
 
1) Rename the attached file and try again

2) Do not forward the email and retype the message and try again
 
3) Scan your PC with Anti-Virus software, retype the email and try again

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