On the uk.d-i-y NetNews group, we were discussing availability of email hosting and the options for it, and ended up with the following little exchange:
On 23/03/2024 17:37, Tim Streater wrote:
On 23 Mar 2024 at 17:20:04 GMT, “John Rumm” <see.my.signature@nowhere.null> wrote:
(I must admit to never feeling the need to write my own mail client, although I have had need to write my own mail server in the past)
Eudora stopped being developed and no one seemed to have anything to touch it (IMO). Then I wondered if a combination of a browser window, javascript, AJAX, apache, and PHP could be used to present a credible email client interface to an unsuspecting user. Eventually I got fed up enough with the browser makers fiddling with what a browser was allowed to do that I rewrote the whole thing in Xojo as a proper desktop application. The two versions look remarkably alike, so I was quite pleased with that.
Nice.
Til then I had not heard of Xojo 
The language platform looks interesting - somewhat akin to an OO Basic, with hints of OO Pascal tied up with a fairly rich component library.
Ta for the pointer.