Need a second account, alias won't work

Hi,

My organisation has separate Figma accounts depending on the country. I created a Figma account with my main email, but to be able to be admin in the other team, I need an email with their domain instead. So the company created an alias with the other domain for me. In the background, they are the same, the second email is just an alias that ends up in my primary email inbox.
The alias works fine, I tested to send and receive to/from different providers and it works just fine. But with Figma I receive nothing.
The other team invited my alias to join their team and I never received the invitation emails (nothing in my junk folder either), I also tried to create an account directly with this email and I am stuck at the verification step because I don’t receive the verification emails from Figma. 

To recap, I have one Figma account with one domain that works just fine. I receive notification emails from Figma (like new comments, or changes to files access) no problem. But with my second email (that happens to be an alias with a different domain) I receive nothing from Figma.

I’ve asked support at the company and they think the problem is on Figma’s side.

Can someone help?