When connecting email accounts to Thunderbird, I've checked
remember this password option.
But after a few weeks of password reentering-free life, it asks for the passwords yet again, out of the blue.
Is this sort of expiration a normal thing and can I safely re-enter the passwords?
Or perhaps it is some form of Man-in-the-middle attack?
The accounts I've been asked to re-authenticate to are Gmail.
Other work just fine.
I'm using Ubuntu-ish OS, haven't changed a thing, haven't moved to a different location (IP change), haven't even unplugged my setup. The only change is installing updates on a daily basis.