One of my email addresses, info@guninstructor.com, is used to communicate to and from students on my website. Suddenly, the registration forms received now have Asian characters instead of English in the "To" and "From" header spaces. If I print out the registration form, the Asian characters change to English. If I try a test email from one of my other email addresses to the info address, when I enter the info address in the "To" space, the memory automatically changes the address to the Asian characters for the name but not for the actual email address. My saved registration form emails dating all the way back to 2018 were also changed to the Asian character "To" and "From" header spaces. These were all previously English. Is this some type of malware? Is it in my Firefox/Thunderbird program or is it in my website programming? My website is Word Press and is current and maintained. Thank you in advance for your time and effort. This is mystifying to me.