I currently have 16 different mailboxes for Proton Pass aliases, and I'll likely create more in the future to help organize my incoming messages. I specifically do this by appending "+label" info into the email addresses. For example, I might have the following mailboxes: foo+news@bar.com, foo+archive@bar.com, foo+activities@bar.com, foo+promotions@bar.com, etc.

Feature request: I need a way to search for all aliases that include a given mailbox. For example, show me all aliases that forward to foo+news@bar.com.

I don't know of any way to perform this type of search, and since I'll have over 1000 aliases (due to creating a unique alias for each online account for security purposes), it's impractical to try opening each alias individually to find all that forward to a given mailbox.

Possible ways to implement this:

1. Settings > Aliases > Mailboxes tells you HOW MANY aliases are associated with each mailbox, but it doesn't tell you WHICH aliases. It would be exceptionally useful to support clicking on the name of the mailbox in order to see an editable list of aliases that are associated with that mailbox.

2. Support a special syntax in the "Search in all items..." search field such as "mailbox:chris+news@bar.com", or even just simply type "chris+news@bar.com" and Proton Pass automatically displays everything that includes that search term, including if that's a mailbox used by aliases.

Having a robust and comprehensive search capability is a key feature for any password management system, because it's common for users to have several hundred or thousands of records. Thank you for your consideration.
:-)