Notification through email

Hi there, great program again!
I try to set up notification via email but it does not work unfortunately. I suspect my SMTP server accepting SSL, not TLS, is the difficulty. Does anyone knows how to enable usage of SSL?
Error message is:
“ERROR unable to send test notification: unable to send notification message: EOF”

kopia notification profile configure email
–profile-name=mail
–send-test-notification
–format=html
--mail-from=xx@xxxxx.fr
--mail-to=xxx@xxxxx.fr
–smtp-identity=“Kopia2 (backup to Google Cloud)”
–smtp-password=SECRET
–smtp-port=465
–smtp-server=xxx.obambu.com
--smtp-username=xxx@xxxxx.fr

EDIT, testing through Gmail does not give any error message, but no test email comes thru…

SMTPS (explicit TLS) doesn’t seem to be supported, but using STARTTLS on port 587 should work. Have you tried that?

Thanks, for Gmail I tried Starttls with port 587 and emails didn’t get through unfortunately