Knock down repetitive e-mail with Thunderbird’s QuickText: Good article on Lifehacker about what appears to be a very cool little extension.
The QuickText Thunderbird extension saves collections of reusable text snippets that help you whip up personalized replies to repetitive e-mail messages with a few keystrokes.
Unlike other text saver utilities, QuickText is specific to e-mail because it recognizes variables that reference message details - like the recipient’s first or last name, the subject line or attachment file names.