I don't want to have to remember a lot of different places to change it.
You can always assigned an email address just for IndeXinn (eg. firstname.lastname@example.org). As it is never exposed to spammers on our site you won't ever have to worry about changing it.
Important note: if you chose to do it this way, make sure to log into your IndeXinn account and change you email address to reflect this choice.