Is It Possible?

It is possible.. but if you don't have access to your account to send a ticket, I don't think you can.

Here's the response I got from Nexon when I requested an e-mail change back in January :

 Spoiler

Greetings,

Thank you for contacting Nexon America's Customer Support team.

As a policy, we do not change email addresses on any accounts though there is a chance for a rare exception. In order for us to consider an email address change we need to verify its account information without any errors. Please note that you cannot have two Nexon accounts registered with the same email address.

Please provide the following account information. Please make sure that it is 100% correct and complete before submitting:

Account ID:
Name (First and Last):
Birth date:
Secret Answer 1 (What is the name of your best friend?):
Secret Question 2:
Answer to Secret Question 2:
Registered email address:
New email address:
Reason for the email change:

If you do not remember any of the required information, we are sorry to inform you that we cannot help with your issue. Once we have verified this information, we will determine if we will proceed with the request.

Be advised if you no longer have access to the registered email address because of a lost password, or lost email account due to inactivity then it is your responsibility to contact the email service provider to regain access to your account. Email change requests for these reasons will not be considered.

Sincerely,

GM Tibaroo
Nexon America, Inc.