SKA-L is an Internet Discussion Group.
Membership is open to anyone with internet e-mail access.
You can leave the Subj. Save this message. Just check for errors, correct them, and re-send. You'll know if it got through because as a list member, you'll also get a copy of your message. Internet discussion groups usually have various discussion threads and a thread can easily be identified in the subject line that you can see at your mail directory.