I had the same experience this year. I did not receive any warnings and my account was locked as I did not realize it was expiring.
Additionally, as soon the account was locked I discovered that my e-mail clients could not log in. But to discover the cause of the problem (the expiration), I needed to try to log in to webmail. Nowhere else hte expiration was mentioned, when I unsuccessfully tried to log in to the report tools for instance.
No e-mails has reached my inbox during the locked days. Is there any way to receive those that most probably came (May 16â€“19)?