For pretty much all my not-work-related mail MailMate has become my favorite tool. It is fast, lightweight, supported OpenPGP through GnuPG 2.x, and has decent shortcuts. I also really like that even if the author hasn’t the found time to put a GUI around a feature’s settings, there are settings.
In a recent example I wanted to make sure that for one particular e-mail address
a certain OpenPGP encryption key was used. MailMate doesn’t have any kind of GUI
for managing keys but you can still choose which one to be used for which e-mail
address through the ~/Library/Application Support/MailMate/Security.plist
file. In there you basically just create a simple mapping like this:
{
map = (
{
address = "<e-mail address>";
userID = "<key id>";
}
);
}
You can learn the details deep down in the hidden-preferences section of the
MailMate manual. Perhaps the only slightly complicated part here is learning the
value you should put into the userID field. The example in the documentation
uses the old long-form key ID, which is a bit complicated to get from most
GUIs. Here it’s much easier (and also recommended by the gpg2 manpage) to go
with the fingerprint (--fingerprint option) without spaces. As a fallback (for
whatever reason) you could also use the 8-char key ID normally printed right in
front of your key when using --list-keys.
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