If I understand your statement, canceling an email account with provider immediately eliminates the ability for tbird to access the email. but maybe i'm misunderstanding your statement.

Tks david: I haven't made any effort to cancel email per se. My internet is now fiber, not spectrum cable, new router, modem, etc. So I told spectrum I'm leaving and paid up until 12/12. I have never used spectrum site to access email. Have always used an email product that's common to web browser. Tbird with Firefox last many years. Just wanna make sure that all of a sudden I have no access to email address I've had for 25 years.

Welp, Tbird worked on my old spectrum address a few weeks after last day at spectrum. Created a yahoo.com address that I've been using for those weeks, all good, made it default in Tbird settings. Also at settings saw option to delete old address not expecting to lose 3500 emails. Lost 3500 emails. Have another post on this help site related. Can't seem to find out how to make my mozilla sign in my new address. Would also love to find those emails. tks dacyak@yahoo.com / new

This is a continuation of https://support.mozilla.org/en-US/questions/1566327 Please mark this one closed. thanks.