Well, who would have thought I would launch a project before my actual main service is still under construction?!
I have the domains, the server, the internet the knowledge.... I just lack the time, energy and effort.
With Google, blaming everyone else except themselves, reaching limits on testing emails.... Me and Gemini got together and we built SQHome Mail Test. I used that to prove Google Wrong and actually got that the problem fixed. Then I thought about it... If this helped me, who else can it help?? So I went looking for a domain. After a few days and a fight with Nominet which left a bad taste in my mouth.

Take that one test address <randomkey@1.testonemail.com> send many tests to it as you need.
No need to refresh, grab a new e-mail address and then have to do the whole process over and over again...
Websocket connects and just populates as they come in... Switch between them, see what came in first and know you've tested that one or not.
Check your history and report.testonemail.com links you to the one test with all the emails!
It's free, no paywall, no subscription...
Hosted at SquareComp Ltd, by SquareComp Ltd.