I use the form to add an email address "garybaldi.baldi <at> laposte.net" to the blacklist (notice that the first entry "garybaldi" was added manually in the database. thats means SAuserprefs does not have any problem with connecting to the database):
I save my changes. The email address in the field disappears and SAuserprefs tells me "Successfully changed spam settings". Obviously, the email address does not get recorded in the database.
Thank you for your help.