Log for failed email sending

Hi,

recently, the e-mail sending of the 2-factor authentication no longer works.
I am now looking for the log-file with the reasons why the sending fails. But can’t find the file.
Where are the error messages usually written?

Edit:
under /bwdata/logs/ is nothing like “can’t connect to smtp server”

Greetings

I have seen smtp related errors in logs/api/Api previously, not sure if it helps with your issue.

Thanks for the info.

There is nothing except:

2020-04-05 06:00:00.367 +00:00 [Information] Validating premium for 1 users.
2020-04-05 06:00:00.371 +00:00 [Information] Finished job "ValidateUsersJob" at 04/05/2020 06:00:00.
2020-04-05 07:00:00.001 +00:00 [Information] Starting job "AliveJob" at 04/05/2020 07:00:00.
2020-04-05 07:00:00.001 +00:00 [Information] It's alive!
2020-04-05 07:00:00.002 +00:00 [Information] Finished job "AliveJob" at 04/05/2020 07:00:00.
2020-04-05 07:44:14.482 +00:00 [Information] Api started.
2020-04-05 08:00:00.125 +00:00 [Information] Starting job "AliveJob" at 04/05/2020 08:00:00.
2020-04-05 08:00:00.133 +00:00 [Information] It's alive!
2020-04-05 08:00:00.144 +00:00 [Information] Finished job "AliveJob" at 04/05/2020 08:00:00.
2020-04-05 08:01:21.851 +00:00 [Information] Api started.

Is there a way to increase the log-level?