Hi there!
Aside from the above, you may also try updating your Chrome browser or reinstall it and see if you'll be able to access the website. You can also do the following:
- Open Chrome.
- Press Ctrl + Shift + Delete.
- Select:
- Cookies and other site data
- Cached images and files
- Choose All time.
- Click Clear data.
Then reopen mail.com.
Hope this helps! Please note that this is a public forum, I will be responding you in short period of time and regret for a delay in response. As I am merely a fellow user trying to provide insight and information that may be helpful to others.