If you want to change your email address, log into your account at my.pdfmailmerger.com. Open the user menu in the upper right corner and click on «Account«. You will be redirected to your account page.
Click on the Edit button in the «Email address» area. Enter your new email address and click on «Save«:
You will now be asked to enter your current password in order to prevent unauthorized changes to the email address:
After you have successfully entered your password, your new email address will be saved, which you can use for login from now on.
To be on the safe side, a confirmation email will be sent to your old email address that your email address has been changed.