Perhaps using $strip?

Khaled can't always reply, I'm sure you can imagine how many emails he gets and this forum is where suggestions are best made. From what I remember, if you mail Khaled from certain addresses you will get an automatic email message containing instructions - you must send one back to confirm you're for real and not just spam. Perhaps that email got caught in your own junk mail folder if you didn't get it? ('Course it's always possible he's not using that system anymore, I haven't emailed him in ages and I believe you only need to add your address once)