I sent a bottle to Gmail support. I hope one day they will answer...
But the most important thing for me is to be able to withdraw my balance.
It is not much but I have to make it work.
EDIT: It seems the issue has magically been fixed.
I just tried to enable 2FA and received the e-mail within seconds.
I didn’t change any mailing parameters though (no subscribe/unsubscribe click)
Congratulations when everything go well! Did you get any feedback from them when you emailed support? They may have corrected it when they received your email. But I still have a strong belief that the problem is the connection between their website and the gmail server. It slows down the process of sending and receiving mail
So, did you withdraw money? It is the most important one

Thank you so much for being concerned about my case !
No answer from Gmail support as I write this message.
I just want to clarify that I changed absolutely nothing, be it on Freebitco.in or in Gmail parameters.
It is still a mystery for me as for this issue resolution.
Thank you again for your patience, TheQuin and ChuckBuck
