However, I argue strongly in my GPG guide that PGP/MIME will probably limit your ability to reach many people who (correctly) use GPG, and I recommend against using PGP/MIME. I always just said "If you need HTML, don't let it turn it off in the wizard." Actually, I recommend not using the Enigmail wizard at all, but generating your keys directly in the gpg command-line tool, as some of its options are broader and the implications of your choices stated more correctly. This is a good guide to re-enabling it, so thanks. I've had people ask me why Enigmail stops their ability to send HTML-formatted e-mail, and I noticed, when walking someone else through the Enigmail wizard, that it asks to turn off HTML formatting. And by the way, you can change all of Thunderbird’s preferences from in here too, including ones that don’t have a GUI for changing, and some of them might break everything, so be careful. Then you can search for “send_plaintext_flowed” and double-click the setting to change the value from false to true. This is the exact same thing as going to about:config in Firefox. When you open it it says “This might void your warranty!”, but you can go ahead and click “I’ll be careful, I promise”. From there go to Advanced, then the General tab, and click Config Editor in the bottom right.
#Gpg mail attachments mac os x
In Windows and Linux it’s in the Edit menu, in Mac OS X it’s in the Thunderbird menu. If you do want to use plaintext email, you can enable flowed text by going to Preferences.
Note: There are valid arguments against HTML email, but it’s not a security problem, and some people hate plaintext email. If you’d like to turn on HTML email, go to the Composition & Addressing page and make sure “Compose messages in HTML format” is checked. Once you have enabled PGP/MIME, it’s completely safe to use HTML email, attachments don’t have any problems, and it’s also safe to use flowed text for plaintext emails. While you’re at it, you might want to sign both non-encrypted and encrypted messages by default. Make sure that “Use PGP/MIME by default” is checked. Go to the OpenPGP Security page (if you have multiple Thunderbird accounts you’ll need to do this for each one). In Windows and Linux this is in the Edit menu, in Mac OS X this is in the Tools menu.
#Gpg mail attachments how to
Here’s how to configure Thunderbird to work with PGP/MIME. You can safely compose messages in HTML, there are no problems with attachments, and if you use plaintext email it’s completely fine to use flowed text. Well, none of this is actually a problem if you use PGP/MIME, which is the recommended way of using OpenPGP anyway. And when you use Enigmail’s default settings and compose your messages in plaintext, Enigmail also turns off “flowed text”, so that lines get wrapped at 72 characters. People have also had weird problems with email attachments when sending signed or encrypted emails. I’ve noticed that a lot of people who are new to GPG really don’t want to give up their HTML email, but the Enigmail setup wizard recommends that you do this. HTML email, attachments, and flowed text in Enigmail
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