thanks but I'd like google to do it. literally you/they just need to associate the string "myrealemailthatIwanttoseeeverythingat+spammymarker" with the string "cactusalligatorfortnight" so I can give out the later and it will act as the former does right now, with the relationship between the two strings being a secret. That's Google's job, not mine.
but if you think security by obscurity is enough that I should use a solution that instantly stops working once lots of people use it, then more power to you. I'm not going to do that.
also I use gmail because I don't run my own mailserver. I'm not about to start coding.
There is mailgun, there is gmail api, there is programming.