User Group


Our 'User Group' is hosted by a third-party, '' based in California, USA. New members who opt to subscribe to the User Group will receive an invitation shortly after joining. Follow the instructions in the invitation.

If,as a member of SDOS, you wish to join the User Group at a later date send an email to  or contact the Membership Secretary.

When you have subscribed to the User Group you can

  • Receive messages by email from other User Group members
  • Reply to messages (but please select one of the Reply options at the bottom of the message, rather than use Reply on your email system)
  • Post a message to the group, with photos if you wish, by sending an email to:
  • Change your email delivery preference, either permanently or temporarily, by sending an 'empty' email to one of the special email addresses listed below
  • You can, as an alternative to using email, access the User Group on-line in your web-browser at To register click on the icon above, then click 'Log-In' in the  menu bar.and, the first time, click 'email me a link to log-in'. Once logged-in you can set a password for future visits.

For more information on 'netiquette' please see User Group Guidelines

groupsio logo

Special User Group email Addresses

Use these special email addresses, exactly as shown, to manage your access to the User Group by sending an 'empty' email. Unless shown otherwise you will receive an email asking you to conform the change.

If you are opting for 'nomail' while on holiday, for example, don't forget to restart the service when you return!

User Group email-1