ok, I've got all lot of observation on this matter that can prove quite a bit of this mail thing was very buggy:
1: Maxiom and Moixam were logged in on the day before the mail, during reset and refreshed shortly after reset - they did not get the mail with Pepper summoning icon.
2: Tripitch and Troikast (our main alts) were logged in on the day before the mail, during reset and refreshed FEW HOURS later - this is when they got their diamonds sealed and got the mail.
3: FadesHero and HerosFade (our secondary alts) were logged on the day before the mail, they were offline during reset and logged in much later afternoon - they did NOT get the mail
4: wyun (guild member on vacation - we have been asked to babysit the account until returns) was not logged in for few days before the diamond sealing event, logged him in later this afternoon - he DID NOT get the e-mail
they will make up some bullshit about times and server time and how the light refracts off their anus. its all bullshit, its like anything they give us cost them money, but when their game fucks up they don't say shit.