All of a Sudden, Email is not Sending through 3rd Part Email Client - Thunderbird

Sometimes, they end up in spam and sometimes, they do not send at all

Anyone know the current SMTP server settings? I have tried lots of different combinations but nothing seem to work.   This is only affecting Homestead/Roundcube email.  I have a few other email accounts through Gmail and Zoho that work fine in the email client Thunderbird.