RFDATA provides a mailbox function, which allows you to send messages to other stations for retrieval later - similar to packet BBSes, but obviously on a much smaller (and shorter) scale.
You can get the number of messages waiting for you by sending
>>> L <<< You have 2 message(s) waiting
To read messages, send
R followed by the message number.
>>> R 1 <<< [VE6HUE-1] This is a message to VE6LY-7
To get the date and time a message was sent, send
I followed by the message number.
>>> I 1 <<< From: VE6HUE-1 On: 2020-04-17 21:00:00
To send a message, send
S, followed by the callsign and SSID of the destination station, and then your message.
>>> S VE6HUE-1 I got your message! <<< Message to VE6HUE-1 sent
Replying to a message
To reply to a message, send
Y, followed by the message number, and then your message.
>>> Y 1 This is a reply! <<< Reply to VE6HUE-1 sent
To delete a message, send
D followed by the message number.
>>> D 1 <<< Message #1 deleted
Pounce mode allows you to be notified of new messages. It's disabled by default, but you can enable it by sending
If you have waiting messages and pounce mode is enabled, the next time you send a position packet over APRS RFDATA will send you a message with the number of messages waiting for you.
>>> PN <<< Pounce mode enabled