v4.0.0pre4

• now requires at least Thunderbird 78
• fixed incompatibility with Thunderbird 78 (#199)
• removed option to show DKIM result in the statusbarpanel
• Authentication-Results header: fixed parsing of version
• libunbound resolver: Don't provide a default path (#199)
• libunbound resolver: Improve options description (#199)
• added about page in options
• updated default rules and favicons (#208, #209, #210)

Changes since v4.0.0pre3:

• libunbound resolver: Don't provide a default path (#199)
• libunbound resolver: Improve options description (#199)
• Sign rules: Special treatment of outgoing messages now supported
• Fixed relaxed ARH parsing option (#221)
• Fixed backtracking issues in parsing of from header, resulting in InternalError: too much recursion (#199)
• Fixed options page not correctly working if it was already open on start (#199)
• Added about page in options
• Updated default rules and favicons (#209)

Current limitations:

• Storing of DKIM keys not implemented
• Sign rules: DMARC heuristic not implemented
• DKIM action in the header not implemented

Removed:

• Option to show DKIM result in the statusbarpanel