Filters are sets of rules that allow you to organize your encrypted ProtonMail inbox and custom folders. In this article, we show you how to create a simple custom filter.
Users with Plus, Professional, and Visionary plans can create an unlimited number of custom filters (basic or sieve), with up to 100 active filters at the same time. Free users can also create as many filters as they like but are limited to 1 active filter.
How to create a custom filter
1. Log in to mail.protonmail.com, go to Settings → ProtonMail → Filters → Custom filters, and click Add filter.
2. Give your new filter a Filter Name, then click Next.
3. Specify the conditions that will trigger the filter. The Statement specifies if the filter will trigger when All or Any of the conditions are met.
Click Insert to add additional text or keyword parameters.
When you are happy with the conditions that will trigger your custom filter, click Next.
4. Specify the actions that you would like to perform on emails that meet the conditions you just specified.
Users with a paid ProtonMail plan can Send auto-reply. This option is not available to free users.
You can click the Preview tab to see an overview of the filter you have created or simply click Save.
To manage your filters, log in to mail.protonmail.com and go to Settings → ProtonMail → Filters → Custom filters.
From here, you can Edit and Delete filters using the Action menu. The Status of filters can also be set to active or inactive.
You can change the order in which your filters will be applied to messages. When a message arrives, filters are applied in order from top to bottom of the filter list. Where multiple filters apply to a message:
- All non-conflicting actions will be applied to the message.
- If there are actions that conflict, the last action to be resolved (from lower down the list) will be applied to the message.
Example: You have created 2 active custom filters that apply to a message.
- Filter 1 moves the message to Folder A and marks it as starred.
- Filter 2 moves the message to Folder B and adds Label X.
Filter 1 is applied before Filter 2, with the following result:
- The message is starred (Filter 1)
- The message is given Label X (Filter 2)
- The message is moved to Folder B (Filter 2)
You can change the order filters that will be applied by dragging them using the hamburger icon (4 bars) on the left of each filter.
ProtonMail offers smart spam detection, which can be customized by adding email addresses to your personal Allow List and Block List.
It is also possible to use custom filters to provide even greater control over spam by allowing you to send emails directly to your Spam folder that meet parameters set by you (as described above).
Particularly useful is the ability to send all mail from an entire domain to the Spam folder. To do this, set:
- Conditions to If Sender contains [example.com]
- Actions to Move to Spam.