Please stop using (at) email [dot] com – garmr.
This gently jabbing request reminds me of the days some years ago when I did absolutely everything in my power to thwart efforts of the big bad spammers. Then Gmail came along and I completely forgot about it. Spam detection algorithms are awesome nowadays, be sure to let your clients know that should they request oddly semi-readable obfuscation on their email addresses when in fact that’ll do nothing but frustrate legitimate customers.