We send emails that elicit a response from a prospect that entices them to have a demonstration of our product. We then manually mark those replies as MQLs. Right now I have a trigger campaign that listens for the update to MQL, but in conjunction, the lead "was sent email" within the last 2 days. I have to keep a timeframe on it, as if I leave it open, a lead could become an MQL months down the line from a different email and would trigger that campaign. However, by putting a timeframe on, if someone replies in a week, it would not be counted for this particular email, or could be counted for 2 emails if we sent 2 emails in a week.
I'm wondering how you all track conversions from emails that do not have a form, and instead are based on a human reply?