- Check for new message at startup
- Check for new messages every ___ minutes
- Allow immediate server notifications when new messages arrive

I am using Thunderbird 60.6.1. I am trying to disable automatic retrieval of my messages to minimize distractions throughout the day and ensure emails only come through when I manually check for them. In Tools > Account Settings > Server Settings, I have unchecked the following: - Check for new message at startup - Check for new messages every ___ minutes - Allow immediate server notifications when new messages arrive Despite these setting changes, new messages are periodically arriving into my inbox. Am I missing a setting which needs to be modified? Could add-ons be overriding some of these settings? Thanks, Chris