[alcuadrado]

Tell me paranoid, but I'd never use something like this! you are sending the messages to a random dude on the internet who created this API.

[nmcfarl]

This is the case for every hosted mail solution in existence. And external hosting/procesing in the mail space is quite popular from mailgun to google apps.

So I don't view this as a major concern.

The fact that the maker of this API has a very fly-by-night looking website - that's more concerning. I'd very much like to have some good indicators of trustworthiness, and a good idea of who to sue, if things go wrong...

[alcuadrado]

your last paragraph is what I meant with "random dude on the internet"