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Error 4
Connection was instantly closed by server. Please make sure that
set proper address of SMTP server and make sure that TLS
option is not required.
Error 5
Wrong response to welcome HELO or EHLO command. It seems
stat opposite server is not a SMTP server or server requires TLS
connection which is not enabled at the device. Please check
SMTP server address and make sure that TLS option is not
required.
Error 6
Authentication error. Error during sending AUTH LOGIN
command. Please make sure that authentication at server is
enabled and AUTH LOGIN command is supported by server.
Error 7
Authentication error. Error during sending username. Please
make sure that is set proper username.
Error 8
Authentication error. Error during sending password. Please
make sure that is set proper password.
Error 9
Error during sending MAIL FROM command.
Error 10
Error during sending RCPT TO commands.
Error 11
Error during sending DATA command.
Error 12
Error during sending data of email message.
Error 13
Error during sending end of the data (dot command).
Error 14
Error during sending QUIT command.
Error 15
Authentication error. It likely that was set wrong username or
password. Please make sure that is set proper e-mail sender
address. Sender email address is commonly same as username
for authentication. Another option can be that user is refused by
SMTP server from other reason (e.g. connection is not allowed
from that subnet).
Error 16
Other error during communication with SMTP server. It is likely
that email was not sent. Device diagnostic log can provide more
details about reason of issue.
Error 17
Unable to send test email. Emails are globally disabled, or email
parameters are not properly set (e.g. SMTP server address is
wrong, is set wrong email sender or no email recipients are set).
Error 18
Error during sending STARTTLS command.
Error 19
Unable to switch socket to secured. Please make sure that
STARTTLS feature is supported by SMTP server.