download email


I am experiencing some troubles. All of a sudden, my eM Client seems unable to download my emails. For the past few hours I haven’t received any email, not even in the spam, which is very unusual. I then asked some friends to send me emails, which they did, but nothing comes in the inbox. I have tried to check my email elsewhere, too, including via the provider webpage, or on my mobile, but everything seems blocked.
What should I do? Any suggestion?