1-- reply_all_warn.lua
 2-- Warns when sending to many recipients (possible accidental reply-all).
 3
 4local matcha = require("matcha")
 5
 6local threshold = 5
 7
 8matcha.on("email_send_before", function(email)
 9    local count = 0
10    for _ in email.to:gmatch("[^,]+") do
11        count = count + 1
12    end
13    for _ in email.cc:gmatch("[^,]+") do
14        count = count + 1
15    end
16    if count >= threshold then
17        matcha.notify("Heads up: sending to " .. count .. " recipients", 3)
18    end
19end)