How many follow‑ups do you recommend in a cold email campaign, and does it change if I'm still testing an offer after finding product‑market fit?

I start with two emails in total: one main email and one follow‑up. The reason is to put yourself in the shoes of someone reading a crappy email. Think about how many times you’ve opened a pitch email, marked it as unread, or ignored it. If the email isn’t good, a follow‑up makes the recipient far more likely to mark it as spam—about 100× more likely after the first follow‑up and a thousand times after a second. The number one thing we’re trying to avoid in cold email is being marked as spam. So, before you know your copy is good, do not add more than one additional follow‑up, spaced about 48 hours apart. Once your copy is acceptable—say a 3 % reply rate or a 0.5–1 % positive reply rate—you can add more follow‑ups. Adding them will raise your total reply rate, though the proportion of positive replies may drop, the absolute number of positive replies will still increase.