Launched IndieMailer on product hunt today and it's firmly in the #1 spot. Wooooo!
Lots of traffic (and a few signups) coming in. Really good for social proof, either way.
I didn't spend a ton of time on this, mostly it was just filling out the listing with images and seeding with a good first comment (by my partner).
One thing though, I am surprised by how little traffic they send now. It's like 1/5 of what it used to be, a year or two ago.