Connect Mailgun-alike service to Sentry


I have a custom web service with an integrated smtp server (quite similar to Mailgun).
I saw that Sentry has an integration for Mailgun and I was wondering if it is possible to do the same with my custom service.

Should I have to fork the repository and override the Mailgun implementation?
If the above is the case, what will I have to be careful of?

Thanks in advance,
John Moutafis