There have been many individuals such as yourself who use gmail that report emails from Intrepid are going to their "Promotions" or spam folders. While there have not been a great number of updates that have gone out thus far post Kickstarter via this method that is likely why.
If you are missing your KS key code to redeem and apply to your account, there are instruction posted here in support for you to follow. The link is - https://forums.ashesofcreation.com/discussion/36172/what-to-do-if-youve-not-received-lost-your-kickstarter-backer-code/p1 . Now in reference as to the specifics of the email that was sent:
Once you have your key, either from your inbox / promotions folder, or you follow the above posted instruction to have it resent, you will go here to redeem it - www.ashesofcreation.com/code-redeem.
I would advise that you also join the official Ashes of Creation discord for updates - https://discord.gg/ashesofcreation. You will find all official updates from the DEV team in the GAME INFORMATION catagories at the very top of the discord menu. These include #welcome, #faq, #news, #game_information and #social_alerts.
Since Alpha 1 hasn't begun yet, you should probably chill. Alpha 0 is currently in phase. That one was accessed by winning a key in the weekly drawings or event participation. No one has received a key for any of the KS Alphas yet, and probably won't for a good long while.
Imperius_Integretas additionally if you question is in regards to phase access, the Braver of Worlds backer access is to our 1st phase of Alpha known as Alpha 1. We have posted an update here that includes updates regarding release phase timing - https://forums.ashesofcreation.com/discussion/36788/faq-read-me-before-posting-customer-service-updated-01-07-2018#latest . I will also post that part here below for clarity:
Q: When will Ashes of Creation launch?