Might find .xyz domains are more likely to be marked as spam, and people may be unlikely to want to use one. Its short to write but long to say / not common.

I could be wrong but I think very few will be enticed by the domain alone or at all.

Personally if I was building an email platform, I wouldn't rely on a third party email API as its part of your core thing, I'd run my own email stack, would give you so much more control / flexibility and be cost effective.

I'm pretty happy with fastmail for my email and use mailpace for transaction stuff from apps, although I did run my own mail servers for about 10 years.

"AI powered" isn't explained. The homepage doesn't tell me what's special about the service. If the service was AI-built then that's a negative argument.

"W combines a highly optimized interface with built-in AI capabilities like Spam Scanning, Smart Reply and Text Summaries." - add that to the homepage. It's entirely unclear to the reader.

Personally I wouldn't need any of the features, the big players already have them.

Website is hard to read. The font size, the colors. What's the fascination with dark gray text on black background?

Short domain name is only as helpful as I don't need to spell it out over the phone. hey-dot-com vs double-u-dot-ex-why-zed.

https://en.wikipedia.org/wiki/.xyz "It was estimated in 2022 that 6.62% of extant domains in the .xyz TLD were malicious. Due to these instances of malware, scams and phishing, multiple anti-malware vendors have blacklisted many or all .xyz domains."

Using Mailgun is too risky. You're responsible for your user actions and they can suspend the service when they see over 0.08% spam reports. One user doing a spam campaign can risk the whole project.