Email account logon identity is becoming unavailable to me

The email service I use to login to Avast will not be available to me from 4 April 2016. This forum does allow the user’s email address to be changed. What should I do?

The possibility that a user’s email address might become unavailable seems not to have been considered by Avast.

I also use the email address to register my free Avast software.

See: https://www.avast.com/faq.php?article=AVKB210#idt_090