MS Graph API and SMTP

[PimThomassen-Clickt]

Hi all,

I am looking for some guidance on setting up this proxy to purely work through the Graph API for SMTP.
Currently I am using the Exchange Online API and that works like a charm. As far as I understood it when using the Mail.Send (https://learn.microsoft.com/en-us/graph/api/user-sendmail?view=graph-rest-1.0&tabs=http) from the Graph API it wants either a Mime type message precomiled (no greater than 4MB) or a JSON file. Is this something the proxy is currently capable of? How would I set this up?

If not how would we start building something like this as the application I am using this proxy for is just simply to stupid to do anything more than simple (non-authenticated) SMTP. Yes, I know that is not a possibility at all in this proxy so I programmed that in already.
If anyone is interested I could also share that.

kind regards,
Pim Thomassen

[simonrob]

The proxy doesn't do any handling of messages, and apart from things related to (and pre-) authentication, it doesn't understand any of the connection. It is entirely focused on removing the need for OAuth when using IMAP/POP/SMTP.

If you are looking for SMTP over the Graph API there are already projects tailored to this (e.g., SMTP2Graph).

[PimThomassen-Clickt]

Thank you for your quick response and your knowledge on projects better suited to what I seem to need.
Also thank you for building creating email-oath-proxy. It is really good that this is out there. I was asking because one of my clients was looking for a solution to "this stupid program needs OAuth upgrade to do SMTP send" but when I proposed this solution they came back saying well yes, but Exchange Online API will be end of life October 2026. Hence my renewed search

[simonrob]

Thanks for the kind words. Just to pick up on the point about Exchange Online – the only thing that is being end-of-lifed is EWS.

IMAP/POP and SMTP are unaffected, so the proxy will continue to work.