If it ever happens again, to remove his email follow these steps.
Send an email to -
[email protected] (you can look on forums this is jagex's help email).
All you need is the recovery information.
You'll get an email back telling you to submit an appeal via the account appeal system -
Code:
https://www.runescape.com/loginapplet/loginapplet.ws?mod=accountappeal&dest=passwordchoice.ws
(that is the actual link to the account appeal system, if you don't trust me you can go to RuneScape's website and get it yourself).
Type your username.
The next box will ask for your registered email. Leave this box blank and click next twice and you will be taken to the Appeal Form.
Fill out the Appeal Form in as much detail as possible, then click 'Send to Jagex'.
The information they need includes early passwords, billing details (if you have ever been a member), contact information and recovery answers. If you did not set any recovery questions, you can choose the option marked 'I did not set any recovery questions'.
Everything is pretty detailed when you get to the website.
I was a playermod for many years, i got this question a lot.
Hope it helps!