Sendind fail2ban emails fails on ncp v1.50.3

Hi,
Just installed a fresh instance of ncp v1.50.3 with a Raspi Image. All good. I set up email notification via nextcloud and smtp. This works great. At the ncp ui, I activated notification emails for fail2ban. They fail.
I believe the smtp settings are not correctly passed over to postfix.
my mail.log shows they are still trying to send from the default. (ncp-fail2ban@ownyourbits.com). I believe the sender credentials are not passed over to postfix.
I have no idea where to set them.
Please help. Thanks!

*edit: typo

I’m unable to check this directly on a ncp instance at the moment, sorry, if I’m not completely mistaken you can find it in the files at the locations written here

Thanks! I looked thrue there and googled around, but was not really able to change the default.
Is it correct to create sendmail-whois-lines.local

and add:

Destination/Addressee of the mail

dest = mync@myemailadress.com

Sender of the mail

sender = me@myemailadress.com

? Sorry if this is a silly question.
I anybody could hint me to a good guide where and how to set the defaults for sendmail, I´d be very thankful. Ideally It would be great to set this in th ncp web-ui.

The wiki for fail2ban sendmail configuration can be found here :slightly_smiling_face: I don’t know but I think it’s the bottom part you need

https://www.fail2ban.org/wiki/index.php/Sendmail