SieveTo

Collection of custom Sieve scripts and contact lists used to filter mail into different folders and labels. Leverages contact groups to easily modify sorting rules from any device without having to make updates to the script itself.

Pros	Cons
Low/no code One filter to rule them all Easy to add contacts to adjust sorting rules Unknown senders appear directly in main inbox	Cannot use wildcards Contact emails must be explicit

Usage

1. Import contact lists. The default contact groups are SieveTo_{category} but can be modified to use an existing contact group by changing the Categories column in the contact list csv file.

2. Add the Sieve scripts as new filters and edit the configuration as needed.

3. Create folders and/or labels matching the configuration. Default structure can be found here.

Sieve Documentation

Proton Mail Guide

Sieve Documentation

External Lists Extension