GW Account Question

The e-mail I used to originally create my GW account is one that I never use anymore. Since my NCsoft account is linked to the e-mail I actually use, I'm assuming it's safe to deactivate that old e-mail address, since it really has no function other than being the username for my GW login screen, but I wanted to check here to be sure.

its no problem at all

my gw account email has been defunct for 6 years

the login "email" is just a text string, it does not have to be active.

Excellent, thank you.