1.2.0 / 1.2.1: The subject line is now checked for attachment keywords too (e.g. an empty body with the subject "Invoice attached"). When you forward a message, you are also warned if fewer files are attached than the original had. New diagnostics log and a small counter on the settings page. "Send anyway" always works. Note: update asks for one new permission, "Read your email messages", used only to count the attachments of the message being forwarded.
1.1.15: Shorter toolbar label. 1.1.14: Fixes a false "missing attachment" warning when files were attached.