— They respond with a numeric code
— Related (but python)
— Heh, if they all follow an RFC like that, should be easy
— You can look for the multipart/report MIME type
— krishand ^^^
— They also do message/delivery-status apparently
— Oooo ok, there's a header called X-Failed-Recipients :D that's all you really need!
— God they are all so inconsistent according to the people on SO there...
— Isn't email just great :/