any problem if I dont verify the email?

I have some twitter old accs, all of them was email verified before, but now I'm getting an annoying message: "
Is your email address active? We've tried to send emails to [email protected] but they are not getting delivered.

Please update your email settings or try sending a message again to your current address."

It's because the email account was blocked, and for sure I won't PVA all those emails.

try to disable email notifications so that twitter wont even try to send anything to those emails.

Try to change new email id because your twitter id easily get suspended . . .