I can receive from outrlook365 but cannot send....... my email shows up(lornea@fowc.ca)as a good account the outgoing sever settings are correct: they are smtp.office365.com What can be the problem please

PS To my previous this was referring to Thunderbird email set up on a PC

Is your authentication method in outgoing server(SMTP) set to oauth? If not, try that.

I tried oauth that didn't work I have tried all the settings. Still not able to send

It may help to post screenshot of your SMTP settings and complete text of any error messages.