Secrets provides easy assess to many of Mac Os X’s settings that you can otherwise only change by messing around in Terminal with long command strings, which is not everyone’s cup of tea.

It includes tweaks for many Mac core and a wide range of third-party apps. The most popular tweaks across all the apps are listed separately as well.

Of course, here we are most interested in its options for Mail.app:

Secrets Mail Preferences

As you can see from the screenshot, Secrets allows you to

• specify a default BCC email address
• force Mail to display messages in plain text
• set the Bundle compatibility and enable bundles
• enable and disable the data detectors
• switch the new (annoying) Snow Leopard behaviour of including names in copied email addresses on and off
• set a sent mail sound
• specify a minimum for HTML messages and a preferred text encoding
• request read receipts
• set the interval for refreshing Mail’s RSS feeds
• Decide whether to display attachments inline or not.

And more.

Some people will think of it as a hack and might be wary. However it comes with the reassurance that Alcor, the developer also (once) behind Quicksilver, is its creator. That’s a strong pedigree.

Secrets is freeware and available from the Blacktree web site .

UPDATE: I read on TUAW that the Blacktree site is overloaded. Secrets is also available from the app’s page on code.google.com. secrets, preferences, hidden preferences, terminal, mail.app, apple mail, tweaks, tips, bundlesSimilar Posts:

• Secrets is back: Clever Preference tweaking
• Fixing a little annoyance in Snow Leopard’s Mail.app
• Snow Leopard Mail.app to be two thirds smaller!
• Mail Act-on gets Leopard installer
• Snow Leopard’s shrinking mail.app: Mystery solved

Developed by Alcor, who is also the brains behind Quicksilver , Secrets makes entering arcane text strings in Terminal a thing of the past.

It lists available tweaks by app. Here is the pane for Mail.app:

Once, in order to work around the minute font size in messages from email clients like Outlook Express, you had to open Terminal and type:

Now, it’s as simple as entering the point size you prefer into the text box of Secret’s “Minimum HTML Font size” option, restarting Mail and enjoying readable text.

The Mail section also lets you set a preferred text encoding for Mail, enable plugin bundles and more.

The Top Secrets pane lists the most popular tweaks:

Here you can (among many other things) set a nice Desktop picture for your login screen, show or hide hidden files in Finder, tweak the Dock and unlock dragging widgets out of the Dashboard.

Of course, this kind of power comes with a hint of danger. As Alcor warns, “Secrets is in Beta and many of these options can harm your system if used improperly.” Nothing very terrible has happened to me though.

Behind the scenes, Secrets allows clever users to create their own tweaks which are stored on the Secrets server and can be downloaded by normal people like you and me with the pane’s “Update Secrets” button, so the list of options is always growing and improving.

Get the latest version (1.0.4, Leopard-only) from Secret’s Google Code page . quicksilver, secrets, preferences, terminal, mail.app, apple mail, leopard mail, productivity, tweaksSimilar Posts:

• Secrets Updated for Snow Leopard
• Apple revises technote on printing in Mail
• Do It 2.4: Nifty task list app gets more nifty
• Setting a minimum HTML font size
• Incoming mail font size small