To submit a letter to the IGNOU regional center for changing the wrong email address you need to visit your regional center first. You can also send an email addressing your issue. A sample mail is shown below:
Respected sir,
I am Ajay(programme name, enrollment number). I would like to notify you that I have made an error while entering my email address and would like to make the necessary correction.
Email address in form:
Original email:(Corrected):
Thank you for your patience and my sincere apologies for the inconvenience.
Hopefully,
Ajay
Attach your admit card and send the mail. Your query will be resolved in no time.