87839f78_System_Log_Information__Problem_and_solutions
[Message] SMTPC: no smtp server. connection close. [Problem and solutions] 
Connection to the SMTP server failed due to no response from SMTP. This could be because a server other than the SMTP server has been specified, or the specified SMTP server port number is incorrect. Check the SMTP server name, port number, or the SMTP server port number.
System Log Information
Problem and solutions