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The diagnostics buffer entry can contain the following information:
● Internal error identifier
● Last response of the server
● Number of attempts
Internal error identifiers
The following internal error identifiers are possible:
● 1: Error in certificate check.
Check the certificates of the relevant service.
● 2: Connection monitoring time exceeded
Check the reachability of the relevant service.
● 3: Other error
Last response of the server
The error codes of the e-mail or FTP server have the following meaning:
Table 6- 1
Code
421
450
451
452
500
501
502
503
504
521
530
535
RTU3030C
Operating Instructions, 09/2017, C79000-G8976-C382-04
SMTP (e-mail)
Meaning
Service not available. Connection is terminated
(often lack of resources of the service provider)
Action not executed: Mailbox not available / unreachable.
Try again later.
Action aborted - error in execution
Action aborted - not enough system memory
Syntax error: Command unknown.
Syntax error
Check the configuration data.
Command not implemented
Wrong order of the commands
Parameter unknown or not implemented
The domain does not accept the e-mail.
Access denied
For access using STARTTLS encryption is necessary.
SMTP authentication incomplete
Check "Services" > "E-mail" in the configuration:
"User name" and "Password"
•
"Connection security"
•
Diagnostics and maintenance
6.2 Error identifiers for e-mails and FTP
255
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