subscribe fmri-announce <your e-mail address>
If you have a signature block at the end of your mail, Majordomo may
mistakenly believe each line of your message is a command; you will then
receive spurious error messages.
To keep this from happening, either put a line starting with a hyphen ("-") before your signature, or put a line with just the word
on it in the same place. This will stop the Majordomo software from processing your signature as bad commands.