First make sure that you have registered your email address on our support site. Then follow the instructions below:
In order to change the email address associated with your Comodo account you will need to send a request from the email currently associated with the account to firstname.lastname@example.org.
If you are unable to send from the email address which we currently have on record then the new email address for the account must be at a domain which is currently associated with the account and has been validated and must be an email address which can be reasonably assumed to go to someone with administrator level rights on that domain, such as:
An email address which is listed as an Administrative or Technical contact in the domain WHOIS information is also acceptable.
If you need to make other changes to your account information, click here