Hacker News delivers again. What an incredible example of quality feedback from a would-be customer. As one of Mailgun founders, I can also confirm/agree with all of the suggestions above.
> Telling you now, someone will sign up with stolen credit card, spam like hell and you will be left with clean up. Been there, done that.
Ignoring this advice killed some companies in this space.
Exactly, it's incredible. It's a pleasure to exchange like this.
As mentioned earlier, we've already experienced similar issues and have done everything we can to prevent it from happening again.
Thank you for emphasizing this point, especially considering that Mailgun is a pillar in the field.
> Telling you now, someone will sign up with stolen credit card, spam like hell and you will be left with clean up. Been there, done that.
Ignoring this advice killed some companies in this space.