Suddenly cannot send emails from two accounts
I suddenly cannot send emails anymore from two accounts (the accounts have the same hosting provider and website domain). The problem is only in Thunderbird and not when I want to send emails through another email software (like an app on my phone). I did not change anything in the settings before. I checked the outgoing server settings to make sure they are correct. I also googled for articles to do troubleshooting. I appreciate any advice and help! Thank you!