Unable to send out emails-unknown account

Hi-I am trying to send out an email but the message is coming up-“there is no account setup.Please add some account first in order to send emails”

I don’t understand this-I am receiving emails therefore I must have an account. I have a free license. I signed in with a POP3 and a STMP .

It also says in the message area-

From No account

Thankyou
Diane

Hello,

have you been able to send emails before?
If this is fresh install and you have added new account over automatic setup can you try re-add it manually (Tools - Accounts - New account - Mail - Other).

regards
Jan