## beep_new
## bindir
## ca_certificates_file
+## cachedir
## cert_file
## charset
## docdir
-## dotlock
## dsn_notify
## dsn_return
## editor
+## enable
## envelope_from_address
## file_charset
## force_tls
## spam_separator
## starttls
## sysconfdir
+## threshold_delete
+## threshold_flag
+## threshold_read
## tmpdir
## use_8bitmime
## use_domain