Http://mail.caucasus.net
It looks like you've shared a URL for a mail server!
http://mail.caucasus.net
appears to be the URL for the mail server of Caucasus Online, a telecommunications company based in Georgia.
This URL is likely used for accessing email services, such as sending and receiving emails, using a web-based interface or a mail client like Microsoft Outlook or Mozilla Thunderbird.
Would you like to know more about Caucasus Online or their email services?