Thank you, Marcos. OK, I will figure out, how to send mails to GMAIL not using SMTPS - pretty strange not to support this protocol, but it is what it is... I thought I'm dealing here with a security enhancing software...
But the other 2 questions are still not answered:
are there any log files indicating the success or failure of message sending?
is there an easier way to send test mails than just by creating an eicar file?