ID: 10
Name: NetworkIOError
Description: ${reason}
ID: 11
Name: InvalidHostName
Description: Invalid hostname '${host} specified.
ID: 20
Name: SMTPError
Description: SMTP error ${smtp_code}.
ID: 30
Name: SMTPServerNotSet
Description: SMTP server is not set.
ID: 40
Name: SenderNotSet
Description: Default sender is not set.
ID: 50
Name: EncodingError
Description: Could not encode mail message: ${reason}.