Attachment search is essential for both everyday life and work. I often need to find an invoice, receipt, booking confirmation, warranty, contract or important information hidden inside a PDF or document.

Usually, I remember a word from the attachment, not the sender, date or email subject. Opening messages and files one by one feels like going back to the Middle Ages.

Please add full-text search inside PDF, Word and other common attachments. Without it, it is very difficult to use Proton Mail as a primary email service.

Proton Mail is able to search for messages which have an attachment.
I would appreciate an improvement by adding an extra condition for a size of attachment. It is especially helpful when I try to downsize the mailbox.

E.g. Find messages with an attachments larger than 5 MB.

This feature existed since late 2023. Wording is not exactly "contains attachments" but is "Has attachments".

https://proton.me/blog/mail-calendar-improvements-2023

I get a lot of email from regular correspondents and I need to pick out just the ones with attachments (from all the chit chat emails they send) so this feature is critically important to me ( ATM I waste time scrolling through pages of emails to find the ones with attachments).

Maybe this should be a separate issue, but the filename should be indexed and used for search. I searched for a unique keyword in an attachment name that did not appear in the message subject or body, and it did not come up