I confess that I haven't been endlessly practicing my new married signature. I did however check that I could "upgrade" from my firstname.lastname@example.org account if the email@example.com was available.
I should probably make sure I'm not like a friend of mine who had a mild panic when she went to sign her new married name at the bank. She couldn't remember how to spell it.
I also have to work on the pronounciation and not hacking up a large amount of phlegm when I roll the 'r' in the the "gr" of the name. That could be embarassing.