My “From” says that there is no account but, in tool/accounts it shows the one that i am receiving emails from. Why isn’t my account listed to sent emails?
Open the account settings, tab SMTP and check if this service is enabled.
from tools/accounts there are only 3 tabs “General, IMAP, Diagnostics” available.
In that case try to create the same account again and make sure you configure the SMTP server properly.