I have been using thunderbird for a while now. Until recently something has happened when I have updated to ver 78.5.1. I can receive emails but can not send emails. My security setting must be wrong with this new version. What should I have as "Security Authentication". There are 2 fields in this area one is Connection Security and the other authentication method. Do I use SSL/TLS or STARTTLS or none for the Connection security? And for the Authentication there are 4 choices is it "NORMAL PASSWORD" or "NO AUTHENTICATION" or " ENCRYPTED PASSWORD " or "kerberos" Your help is much appreciated.
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