I´m running open project in a (single) docker image - after getting around the first hurdles (like setting up beside an existing apache2 with owncloud) I`ve got it working... almost...

I can´t get the system to send emails... in the admin - administration - email settings I´ve set up the smtp server.
Once I click on send testmail I get green feedback "testmail sent" ... I can see the mail actually getting send but being recjected because of the email adress "admin@example.net" in the respective email account I use for sending.

Same is happening when I sent an invitation mail - green feedback signalling success...
But this time - no mail seems to be sent - no rejection even when I use a non-sense eMail adress for the user I want to invite...

But no mail is arriving. I´ve checked the settings by using the same setting with thunderbird... outgoing mails are sent perfectly fine. So it´s not the smtp server or user/email adress...