Currently Being ModeratedJul 7, 2013 5:10 PM (in response to disguise)
With Mountain Lion, I think this is burried further in your Library/Prefernces folder.
as the path.
The file name is now "Accounts.plist" in the MailData folder.
Currently Being ModeratedJul 7, 2013 5:25 PM (in response to Matthew Morgan)
I was not suggesting that he delete the .plist file.
I was just responding to where the plist was now located.
The signatures folder is found in the same MailData folder now.
You are giving the command location for how to add and delete signatures in the application.
If this file becomes corrupt, it is good to know where things are located to recover from a backup file.
My Accounts.plist became corrupt again after a system crash. I had to recover it just today.