By 'thing' I hope you're referring to safe-mail. PGP should be used religiously on the new SR server messaging system regardless. Remember on the previous site.. many vendors would insist or demand that only sensitive messages be encrypted, and that they don't have the time to decrypt non sensitive information. Frankly, my advice is to ignore that and explain that you will only be using PGP. Even an "are you in stock?" should be encrypted IMHO. A few extra seconds of a vendor's oh-so-precious time is not something you should accommodate at the expense of your own security. Always assume that any communication can be read and analyzed at any point in time present or future.