Can't login because lost access to my mail

Hi, I've lost access to one of my mails and cannot take it back. I tried to login to Dropbox with the password but Dropbox is sending a verification to that mail I don't have access anymore.

 

I tried the instructions on how to change your mail but firstly you need to login and Dropbox is asking for that verifiacation code.

 

Is there a way I can recover my Dropbox account? I tried everything with mail provider and I don't think I'll manage to recover that mail.

 

Thanks!