Great Bank But Odd Verification Question Asked

WT direct is a great bank for the most part to deal with...however I just called and was asked the following info to verify who I am:

my account number
my full name
my date of birth
my last 4 of the SSN
my physical address

and

my email address

I asked the rep if email address was really necessary to verify who I am...and if he would refuse to talk to me if I happened to not remember what email address I used to sign up (I have quite a few and can't confirm it on the spot).  It took me 3 tries to finally guess which one I used...but it seems really odd that a bank needs to verify your identity based on email.  I specifically asked if it was because he needed it for his "Records" (ie - marketing and statement purposes) or whether it was really for verification of my identity.  He said it was for verification.

Has anyone come across this???