Cold-email follow-ups subject lines

10 examples

1. 1.Re: {{originalSubject}}
2. 2.Bumping this
3. 3.In case it got buried
4. 4.One more thing on {{topic}}
5. 5.Closing the loop
6. 6.Last one, I promise
7. 7.Should I keep you in the loop?
8. 8.Reply with 'later' and I'll check back
9. 9.Quick yes or no?
10. 10.Found something after my last note

What makes these work

Follow-up subject lines after an initial cold email have a different job than the original: they need to re-surface the thread without restarting the pitch. The two patterns that consistently work are 'Re: {{original subject}}' (lets Gmail thread it, signals continuation) and a short bump line ('Bumping this' or 'In case it got buried'). Avoid new pitches in the follow-up subject; the body can add new information, but the subject should re-anchor to the original. After two no-responses, the 'breakup' subject earns its keep ('Closing the loop' or 'Last one, I promise') — these give the recipient permission to say no, which paradoxically generates more replies than soft 'just checking in' subjects. Long subject lines lose more than they gain on follow-ups; under 40 characters is the safe range.

Templates that use these patterns