NTS messages can be sent from any PBBS.  The format is as follows:

At the PBBS Prompt issue the command "ST XXXXX @NTSYY" where XXXXX is
the 5 digit zip code for the destination and YY is the 2 letter
abbreviation for the state or province (e.g. NTSNJ, NYSNY, NTSTX etc.)
When the PBBS responds with the title prompt enter "QTC Town AAA-AAA"  
where Town is the destination city/town and AAA-AAA is the telephone
area code and three digit exchange.
When the PBBS asks you to send the message, type in the NTS message in
standard format. For example

NR 945  R WB2FTX 5 BUTLER NJ OCT 22
BEN JONES
110 MAIN STREET
BLOOMFIELD NJ 07003
BT
THIS IS A TEST MESSAGE
BT
DAVE WB2FTX
AR

You can enter either 5  or 10 words to a line. The BT and AR are used
in the same fashion as on CW and Phone.  At the end of the message
issue either a control-z   or  "/ex" to tell the PBBS that you have
finished the message.

73 Dave WB2FTX SYSOP Section Traffic Manager NNJ