Send attachments as real attachments

This article was written for Thunderbird but it also applies to the Mozilla Suite.

Thunderbird normally sends plain text attachments inline, as part of the message body. If your recipient wants them to appear as real attachments add user_pref("mail.content_disposition_type", 1); to prefs.js or user.js . That should work unless the recipient configures their email client to display attachments inline. There is nothing you can do about that other than tell them its their own fault.