I used the pxdmail.com for my first proxy email.
Knowing some of my email targets are likely to look up the website to that address, I tested the URL...and I got this warning,
"Your connection is not private
Attackers might be trying to steal your information from pxdmail.com (for example, passwords, messages, or credit cards). Learn more about this warning
net::ERR_CERT_AUTHORITY_INVALID"
.....I was hoping the website would be a staged business site or something that looked official, hence the reason I do not want to use a gmail or other freebie for sales emails.

Could you please look into this and let us know what this is about?

You have a great product and I appreciate your service, so I hope this is simple as I know your company is authentic and reputable...appsumo never lets the bad guys in. They protect us. Thank you!