For How many days the message stays on the trust page?
For a month? As a month passed and it's still on my many accounts.

Anyone knows for how long it stays?
I asked a similar question a while ago and theymos answered:
You're considered to have woken up if your last login time is 180+ days ago, and the message remains for 30 days.
It's probably the same 30 days for an email changed. When you say a month has it actually been 30 whole days?