Automatically save all email attachments in Apple Mail https://lewery.ca/automation/autosave-email-attachments

attachment-saver.applescript

(*using terms from application "Mail"
    on perform mail action with messages theMessages for rule theRule*)
 
-- Adapted from: http://www.markosx.com/thecocoaquest/automatically-save-attachments-in-mail-app/
-- For usage instructions, see: https://lewery.ca/automation/autosave-email-attachments

set MainFolder to "Dropbox" -- After the current users home dir
set subFolder to "mail"

-- The folder to save the attachments in (must already exist)
tell application "Finder" to set attachmentsFolder to ((path to home folder as text) & MainFolder & ":" & subFolder) as text

tell application "Mail"
    set theMessages to the selected messages of the front message viewer

    repeat with eachMessage in theMessages
        set theAddress to extract address from sender of eachMessage

        if (count of (eachMessage's mail attachments)) > 0 then
            try
                tell application "Finder"
                    if not (exists folder theAddress of folder attachmentsFolder) then
                        make new folder at attachmentsFolder with properties {name:theAddress}
                    end if
                end tell
                -- Save the attachment
                repeat with theAttachment in eachMessage's mail attachments

                    set originalName to name of theAttachment
                    set savePath to attachmentsFolder & ":" & theAddress & ":" & originalName

                    tell application "Finder"
                        if (exists file originalName of folder theAddress of folder attachmentsFolder) then
                            set savePath to attachmentsFolder & ":" & theAddress & ":" & originalName
                        end if
                    end tell
                    try
                        save theAttachment in file (savePath)
                    end try
                end repeat
            on error error_message number error_number

            end try
        end if
    end repeat

end tell
(*end perform mail action with messages
end using terms from*)