It would significantly improve user experience and reduce user confusion if the mailbox view could indicate which messages contain PGP encryption. This feature would be very useful because the Thunderbird search function is unable to search the contents of PGP encrypted messages, therefore, when searching, the user needs to manually search each PGP message. Unfortunately, it is currently not possible for the user to manually search each PGP message because the mailbox view does not indicate which e-mails are PGP encrypted. This feature request could be accomplished by adding an "Encrypted" column to the mailbox view, which, similar to the "Attachments" column, would display a "padlock" icon next to any encrypted message. A different way to implement this feature request would be to improve the existing "Attachments" column so that the "Attachments" column would display a "question mark" icon next to any encrypted message. Currently the "Attachments" column incorrectly reports all encrypted messages as not containing attachments regardless of if the encrypted message actually contains an attachment or not. A "question mark" icon would correctly indicate that the "Attachments" column does not know if the encrypted message contains an attachment. While such a "question mark" icon would be an improvement because it would identify nearly all encrypted messages, it would not identify all encrypted messages because it would be technically possible (though unlikely) for an e-mail to be PGP encrypted while simultaneously containing an unencrypted attachment.
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