FBX version is latest update, running on Debian Bullseye.
Can send email, but cannot receive. Instead the logs say:
Error: lmtp-server: conn unix:pid=69135,uid=124 : rcpt firstname.lastname@example.org: Failed to initialize user: Mail access for users with UID 10001 not permitted (see first_valid_uid in config file, uid from userdb lookup).
Temporary internal error (in reply to end of DATA command)
The first_valid_uid in config file is 500, so 10001 seems … odd?
Any help would be much appreciated!