In English mail, what is the difference between FYR and FYR for reference only?

The difference between "FYI" and "FYR" in English mail;

For reference only? Give you information.

FYR is for your reference and provides you with reference (information).

Both of them have the meaning of providing information, but the former FYI provides accurate information, and the latter FYR provides relevant or similar information as a reference.

The abbreviation of your information. The information provided to you is for your reference. It is a popular English abbreviation for foreign companies at present. This is a working term, which is often used in work emails.