smtp outbound log

[meiru@gmx.net]

In my SMTP log I can find a lot of "SMTP-IN" lines, but no entry for outgoing mails (but I know that it has been sent via this server). How can I find logs for outgoing SMTP activities? Or what do I have to activate to get outbound SMTP log entries?

[Admin]

For any outbound sends you will see SMTP-OU. There is not an option to disable logging for either in/out. If you search the log file you should be able to find the SMTP-OU, as generally there is a lot more inbound than outbound.