v5.1.0

Enhancements

• Added heuristic to detect maliciously added unsigned headers (#102).
• Configurable option to warn about unsigned headers that are recommended to be signed (#102, #277).
• Improved theming of header icon in Thunderbird 102.
• Authentication-Results header: Prefer to show failure results that include a reason and are related to the sending domain (#247).

Fixes

• Fixed error when opening messages in a new window in Thunderbird 102.

Other

• updated default rules and favicons