Rspamd User Config deleted on mail user changes

For some long time I noticed, that spam filter settings are sometimes not being applied properly and these days I took a look into it. So what I found was, that ISPConfig was dropping existing /etc/rspamd/local.d/users/user_domain_tld.conf files when something was changed in for the mail user.

Steps to reproduce

• Create a mail account and set a spam filter for it (the normal one will do it).
  • The config file in /etc/rspamd/local.d/users/user_domain_tld.conf should now exist.
• Now change something for the mail account
  • The file should be deleted
• In order to get ISPConfig to write the config file again, just change something that triggers spamfilter_user in user_settings_update() function in the rspamd plugin.

I was able to fix this quick and dirty for myself by adding && $type == 'spamfilter_user' to the if in rspamd_plugin.inc.php#L284

My Setup:

• Ubuntu 22.04
• php 7.4.33
• rspamd 3.2-1~bionic