cannot access https://mail.google.com on mac

Hello,

Since today I cannot access the url: https://mail.google.com

facts:
I'm using a macbook pro 10.7.5
I can log in into my google account
I can access the other google service (calender, drive, etc.) with no problem
I can access everything else on the internet
I can access my gmail account on my android and it works

No webbrowser on my mac allows me to access https://mail.google.com (I've try safari, chrome and Firefox, all programs are up to date)
it says: "This webpage is not available" (Chrome) "server not found" (Firefox) etc...

I'm using the same WiFi for my mac as for my smartphone, so it's not a wifi issue
I've tried with Firefox, safari and chrome and no one of them allows me access to the website, so I guess it's also not a browser issue

I have been using my gmail account on this computer since a long time and I never had problem with it.

Any idea someone?

Thanks!

 

Thank you. I restart my mac AND my router and it works now.