I run a Pioneer-FreedomBox-HSK behind a Router (AVM Fritzbox 7390).
I bought / ordered it on 2021-01-06
About: You are running Debian GNU/Linux 11 (bullseye) and FreedomBox version 21.7. FreedomBox is up to date.
Today I installed Roundcube to read my mail on gmx.net. That works smoothly, however, sending a message fails with:
SMTP Error (-1): Connection to server failed.
So I looked into the preferences to change SMTP settings. Unfortunately, there seems no way of changing smtp settings in the GUI of Roundcube or I am too blind to see. Also the docs on Wiki does not mention SMTP at all. GMX has a different server address for outgoing mail (mail.gmx.net:465), so this has to be specified somewhere.
Can someone help out? Or point me to the right config file?