Club logo.  A red circle containing a green map of the state of Virginia, the ARRL logo, and the text "Richmond Amateur Telecommunications Society, Richmond, Virginia U.S.A."

Richmond Amateur Telecommunications Society
W4RAT ยท Richmond, Virginia

An ARRL Affiliated Club Serving Central Virginia Since 1972

AREDN Mesh Services

For a current list of available services, visit the project homepage,

Mesh Chat

Multiple Mesh Chat servers are available:


Experimental Winlink RMS Relay

The experimental Winlink RMS Relay serves as a Network Post Office (NPO) speaking the Winlink protocols.  It allows users to send ham radio e-mail messages to one another within our mesh, using the Winlink Express messaging application.  It's also possible to use a regular e-mail client such as Outlook, Thunderbird, Pine, etc., using the SMTP, POP3, and IMAP protocols.

To connect to the RMS Gateway using Winlink Express, open a new Telnet Winlink session and click Settings.  Configure the Telnet Properties dialog as shown below:

  • Use RMS Relay:  Yes
  • TCP/IP path to the RMS Relay site:  W4RAT-VPM-GW
  • Port to connect to:  8772
  • Connect to RMS Relay local message database rather than a CMS:  No
  • Telnet Session AutoConnect Time:  (as desired)
  • Automatic Background Monitoring and Message Uploading:  (as desired)

Click the Start Button.  You should notice the telnet session is with W4RAT-VPM-GW.  You are now communicating with the RMS-Relay and can begin sending and receiving messages from other users on our AREDN system.  The mail system supports local messages with attachments up to 5 megabytes in size.

Connectivity to the rest of the Winlink network is a planned future enhancement.

To return to normal Winlink CMS telnet function, return to the Telnet Properties dialog and un-check the "Use RMS Relay" box.

SMTP, IMAP, POP3 and Webmail access to the Winlink NPO

To request access via SMTP, IMAP, and POP3, send an e-mail to and allow up to 7 days for provisioning.  Once configured, use the following servers:

  • Outgoing mail server:  W4RAT-VPM-GW, SMTP port 25
  • Incoming mail server:  W4RAT-VPM-GW, POP3 port 110 or IMAP port 143

Once enabled for SMTP, IMAP, and POP3 service, you may access the Winlink NPO through an experimental webmail interface at http://kg4peq-gw/webmail using the credentials issued by RATS.

Network Time Services

There are now two ways to obtain a reasonably accurate time using standard Network Time Protocol (NTP) on UDP port 123:

Time Source
w32tm - Win32 ntpd running on-site.  Dependent on system clock.  Host PC syncs w/NTP pool via WAN.
Direct forward to via WAN

Ideally, a GPS-based time source will eventually be deployed on the mesh.

Richmond Amateur Telecommunications Society, Inc. (RATS) is a 501(c)(3) non-profit organization. PO Box 70613, Henrico VA, 23255
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