Google will be turning off email access to services that don’t support OAuth. Will you be adding OAuth support for sending email?
I’m not a developer, so can’t comment on the roadmap.
That said, there are plenty of other email services one can use that don’t impose these requirements on senders. Amazon SES, MailChimp, MailGun, etc. are much better suited for transactional automated emails like this – both from performance and security standpoints. Gmail is designed for human use, and OAuth makes sense there.
I have tried using mailgun and i keep getting the error “Failed to send the email: 501 Invalid command or cannot parse from address”. I know the credentials I am using work because I am using them in other places.
AFAIK and IIRC, there is some peculiarity with the smtp library duplicacy is using, in that it is expecting specific behavior (e.g. STARTLS) when reaching servers on specific ports (e.g. 587 vs 465). Try the other port and see if that works.
Or perhaps you have indeed something weird in the “from” address? Try specifying naked email there.
I had it configured with AmazonSES so that definitely worked in the past.