Is Postini white list case insensitive?

[#1]

Am I correct to assume that the Postini white list is case insensitive? In other words, if I put fredbloggs@plusplus.com in the Approved list it would also let  through FredBloggs@plusplus.com, fredbloggs@Plusplus.com etc?

[#2]

It should be, as email addresses are case insensitive.

[#3]

Thanks James. I'll take "should be" to mean "it is"! 
Just thought I would check because a lot of people seem to like customizing their email addresses with upper case letters. I know that email addresses are case insensitive for transmission through the net but that wouldn't mean de facto that the Postini white list would also be case insensitive. I know it ought to be, but I've learned that you can't trust anything these days to work as you would expect! If, like me, you deal a lot with people like Royal Mail it almost becomes the norm for things to be not as expected.