AP scores deadline for SDSU help

Hey guys, I sent my AP scores the 23rd on rush delivery and I’m hoping they make it on time, but do they have to be postmarked by May 1st or received? It says for all the deadlines, “deadline to submit” does that just mean it needs to be postmarked or does that mean they have to have received it? Has anyone sent in their AP scores rushed because I want to know how long it will actually take?

Also, I got a 2 on both of them and did not specify a date even though I took them last year, so it says they are may 2018 ap scores and has the same deadline for July this summer. Will that help me at all?