That address is auto posted once you send the email, I don't know of a way to remove it but maybe someone else will post it?
I don't mind that address as it brings my subscribers DIRECT to my stuff and that is what I want .... they see I am a part of the greatest community to buy art online, and this makes quite an impression. It's like when you buy music and the artists website has a link that says " available on iTunes " or and author has " available on Amazon ". Impressive!