No, that's not a sane way to interpret this RFC for the receiver either. I already answered this, so you'll have to go back to my earlier comment (this might be my last comment as I won't keep repeating myself): any system (be it Google's or anyone else's) that penalizes you equally regardless of whether the recipient's addressed existed 1 day vs. never existed is just plain trash. A sender that attempts delivery to an address that accepted their email a day ago is obviously unlikely to be a spammer; there's no justification for treating them as one. It is absolutely unreasonable to interpret the sentence this way. Just as it's unreasonable to interpret "the mailman shouldn't knock a second time when he's told the recipient has moved" as "I should never open the door for the mailman ever again if he does so".