Why does website I open with IE 11 say I'm using Mozilla?

[Hopeful]

When I try and open a site that will only allow IE browser it says I am using Mozilla? I don't even have that installed
I only use IE to open one website because it doesn't support Chrome Google--just can't understand why the webpage posts an error and says they have detected me using Mozilla

[Massage Sri lanka]

http;//accommodationsrilank.wix.co,/accommodationsl

[Argus Tuft]

You are the second person in the last 6 hours who openly admits to using IE!

[?]

Are you sure you are really opening Internet Explorer v11?

IE has a blue "e" logo while Mozilla has a fox in its logo.

May I also know the exact address of the website so that we could check if it is a website or browser configuration issue?

[Justin L]

You're not the only one. When I print shipping labels from USPS.com it says I'm using Mozilla 11, but that has never been installed. I am using IE 11.