My system: MailMate/6290/D50E956B-AD1D-520A-893D-148873F43CD0
14.8.5/arm64/MacBookPro18,1/10
When I create new emails, they have 10 min delay for sending by
default. That is my setting. Normally, I just leave it at that.
Sometimes, however, after I click Send, so the email goes into the
queue, I decide that I want to send the given email right away. If
I then edit the email to remove the delay and click Send, the mail
is not sent right away but continues in the pending state. This is
regardless whether I also edit the content of the email or not.
If sending the email is really urgent, I just Edit As New Mail,
remove the delay, and it sends right away, so the workaround is
easy. I use this setting for many years and it used to work without
a problem. This glitch popped several versions ago, but I am not
sure exactly when since I upgrade only sporadically.