For some reason, I am unable to send any emails from my @kindnessagency.com account from Thunderbird. The two emails I have setup with Zoho are info@kindnessagency and jesse@kindnessagency.com 

Getting this error: 

I can receive emails in Thunderbird, I just can't send. Settings in Thunderbird appear to be correct. 

I can send and receive emails in Zoho-webmail without any problem. Just can't send with Thunderbird. 

Been trying to resolve for hours. Please help!