Amazing! I really love the browser extension idea.
One of the risks with this kind of service is that eventually tryninja.io gets blocked in sign-up forms. I'm pretty sure this happened with Mailinator a while back.
It's probably not a big concern for you while you're small but I just wanted to throw an idea your way in case you ever want to do it. What you could do as a "premium" pricing model is offer each user a unique top level domain name when they register. This way every single user could be generated a completely unique domain. Something like [email protected]. Not sure if there's any technical issues owning so many top level domains but anyway, that's the idea.
Or, alternatively, you could also let them use a top level domain that they already own. I realize this could get complex because they'd probably have to configure MX records to point to your mail servers and stuff but at this point I'm just thinking out loud. Feel free to ignore me :)
Thanks! Wow, that's a really good idea and so easily doable. We already offer the option of using their own custom domains, but generating one for each user would be super cool.
Glad you like the idea :) Now that I think about it, it would be even better if the generated domains are readable, the tricky part would be finding domains that aren't already taken.
Maybe you could use a random word generator to pick adjective noun combinations to make it more fun :)
Thanks. Honestly I don't remember anymore lol, I used one of those logo generators that you find online and then googled the font and sketched it out in Photoshop. I wish I could tell you but I don't remember anymore and I have a different system so I don't have the font on my PC anymore.