Fórum da Comunidade de Thunderbird

For the last week I have been unable to send emails from my main email account (Bigpond) because an error/alert message pops up (see attached). I have check the Outbound Server settings and they are correct. I have also successfully sent emails from my providers Webmail as well as from my Gmail account in Thunderbird without an issue. Any assistance would be appreciated. Thanks Peter

I set up thunderbird email account on my computer and my iphone. I can only send and not receive emails on my computer account and I can only receive and not send from my phone account. When I try to send emails from my phone the email bounces to my outbox where it sits and I get a message that says "Cannot Send Mail The sender address was invalid" I think something was off in the initial setup because this problem has persisted from the beginning however I cannot figure out how to fix it. Need help please so that email sends and receives from either location: computer or iphone.