I tried contact google 5 times, its imposible
they have an auto response and then they say each time i should to send emailes, and i sent 10 different examples and it' imposible,no answer from them. i have been contacting them during 1 month so it's imposible
I asked my customer if he sent a newsletter or something like that, and he said me no, i checked logs and no mailing list, no newsletter nothing masive
I checked the web page bulk in gmail, so i created spf records they recomend but same problem.