Ben,W0AYE has a Winlink Gateway station running with access via VARA-FM on 145.690 MHz.
Winlink is a full featured email program for amateur radio and VARA is name of the software modem often used to communicate.
Useful links:
https://digirig.net/
The two programs of interest are Winlink Express and VARA_FM located in their respective subdirectories.
You will also need a USB soundcard with PTT control.
Digirig is popular (my choice) and Signalink USB is an old favorite that will work too.
In both Win 10 and 11 installs, I've had to download and install the UART driver for the Digirig.?
The UART side of Digirig is what controls the PTT signal to the radio. The link to the driver is on the Digirig page.
73
Mike N0QBH