Google Translation:

Technical support for UPC Webmail and related E-mail service will end on March 1, 2021.

Therefore, if you have registered with an email address ending in @ upcmail.hu, @ chello.hu, @ monornet.hu, @ upctelekom.hu, @ upc.hu or @ vodamail.hu, please replace it, because using a non-working e-mail address, it may result in the loss of your user account at a later date.

We also recommend changing to email addresses ending in @ freemail.hu and @ citromail.hu to avoid account theft.

You can get help to replace it here

Carpathians Staff