This screen allows you to join or leave the SH_TEST list. To confirm your identity and prevent third parties from subscribing you to a list against your will, an email message with a confirmation code will be sent to the address you specify. Simply wait for this message to arrive, then follow the instructions to confirm the operation.
Alternatively, you can update your subscription interactively without email confirmation by
logging in with your LISTSERV password (if you have one)