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With a bit of searching I found couple of old stacks for smtp but I don't think they will support TLS connections.
I think they are using socket commands so maybe they could be modified to use 'secure socket'?

Sarah Reichelts smtp library
https://github.com/trozware/rev_stacks/ ... y_demo.rev

Chip Walter´s altEmailHarenss stack, which uses Shao Seans smtp library
http://www.gadgetplugins.com/altplugins ... arness.rev
( via https://web.archive.org/web/20130730074 ... nloads.htm )

Another option maybe to use an email service that has a REST API.

Couple of examples (I haven't tried these myself):
https://rapidapi.com/fapi/api/fapimail/details
https://www.mailjet.com/email-api/

GMail also has an API
https://developers.google.com/gmail/api/guides/sending

Another option maybe to use an email service that has a REST API.

Couple of examples (I haven't tried these myself):
https://rapidapi.com/fapi/api/fapimail/details
https://www.mailjet.com/email-api/

GMail also has an API
https://developers.google.com/gmail/api/guides/sending

For the OP's use-case, this sounds like the most viable option. The first one (fapimail) was .01/per mail...if it is just debugging emails then it should just be a few cents a month...or at least should decrease as the app is improved.

I would avoid Gmail for this sort of thing as google is notorious for deprecating services or abruptly changing them (I am currently having to re-write a bunch of code for several websites that used Google Maps)