Spam filtering, Allow List, and Block List

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4 mins
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Receive and read emails

Proton Mail uses a smart spam detection system to automatically filter messages to your Spam folder or inbox and custom folders(new window). We are constantly improving our spam filtering system, but some spam messages may slip through our filters, and some legitimate messages may be mislabeled as spam.

You can enhance and customize our filtering system using the Allow List and Block List. In this article, we explain how. 

The amount of spam you receive often depends on where you use your email address. For example, if you subscribe to certain websites or services, your email address may be abused. However,  you can sometimes be targeted at random.

Please see how to avoid receiving spam(new window) for tips on how to avoid receiving spam messages, and our dedicated article on how to block email stalkers(new window) if you are a victim of this form of abuse.

Spam filters

To view all custom existing spam filters and Add new ones, log in to your account at mail.proton.me(new window) and click Settings Go to settings Proton Mail Filters → Spam filters.

Spam filters panel

You can search for rules in your custom Allow List and Block List using the Search bar. You can move () rules from the Allow List to the Block List and vice versa, and delete rules. 

Allow List

The Allow List lets you specify individual email addresses and domains that will always be delivered to your inbox or custom folders. Messages from email addresses or domains in the Allow List will never be sent to your Spam folder.

To add an email address or domain to your Allow List:

1. Log in to Proton Mail at mail.proton.me(new window) and click Settings → Go to settings → Proton Mail → Filters → Spam filters → Allow List → Add.

Add to Allow List button

2. Select whether you want to add an individual Email address or an entire Domain to your Allow List, enter the address or domain, and click Save.

Box to add email or domain to the Allow List

Block List

The Block List lets you specify individual email addresses and domains that will never be delivered to your inbox or custom folders. Messages from email addresses or domains in the Block List will always be sent to your Spam folder.

To add an email address or domain to your Block List:

1. Log in to Proton Mail at mail.proton.me(new window) and click Settings → Go to settings → Proton Mail → Filters → Spam filters → Block List → Add.

2. Select whether you want to add an individual Email address or an entire Domain to your Block List, enter the address or domain, and click Save.

Box to add email or domain to the Block List

Custom filters

In addition to Allow List and Block List spam filtering, Proton Mail also provides a custom filters feature that can be used for advanced spam filtering.

Learn more about how to use custom filters(new window)

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