You can easily add email addresses to the Allow List finding the desired message in your Spam folder, selecting the message, then choosing the Move to inbox option on that message.

There are two ways to add an email address to your Allow List: 1) manually moving a message to the inbox, and 2) adding the email address to the list directly. To access the Filter options you need to go to Settings and then Filters: Here you can see all the addresses that are on the Allow List or on the Block List and and edit these lists if needed Any email address in your contact list is automatically included in the Allow List, but if you don’t want to add a certain sender to your contact, you can simply add the sender’s email address to your Allow List instead for the same effect. The ProtonMail Allow List (also known as a “white list” or “safe sender list”) ensures messages from the senders you specify are always sent you inbox. If you’re using secure email from ProtonMail and not receiving email from certain senders, there’s a couple things you can do to ensure messages from trusted senders are delivered to your Inbox by customizing your spam filtering settings using the methods such adding a sender to contacts, adding an email address to your Allow List and setting custom filters. Sometimes, this system will make a mistake by sending a message to your Spam folder that you actually want delivered to your Inbox. ProtonMail uses a spam filtering system that inspects incoming email for malicious or illegitimate content and delivers the messages to your Spam folder or Inbox accordingly.

Is proton email safe