user blocked from sending emails

[GV IT]

one of my users was blocked from sending emails as O365 detected that is was sending too many emails at the same time.

i have unblocked her but she still cannot send emails.

what else can i do to help her ?

[#2]

There's a 24h window that you need to wait, if more than 24h have passed, open a support ticket.

[#3]

24hrs is too long a time to wait.
any way, my user manage to send emails a few mins after i post this thread.