stop "in transmission"

[hime3]

created email. clicked send. email shows "in transmission" for more than a hour.
Can not delete or edit email.
How to terminate "in transmission"?
What might be the issue?
I am on the road and use NordVPN, but never had this issue in past.
hime

[Jeff]

You can press the "Stop" button -- usually the first button in the main toolbar. If all else fails you can exit and restart POP Peeper.