At the bottom of the email newsletter sent to your email address, you will see a message that says, "To unsubscribe from our newsletter, please click here. However, please note that it only takes one click to unsubscribe."
Click on the "here" link to unsubscribe with your old email address.
Then enter your new e-mail address in the "Subscribe below to receive e-mails about the COMSA project" box at the bottom of the official website.