The only option that is not self explanatory is the -l list control option:
This is used together with -F and -T to send one mail to one recipient.
'2' means 'mail to moderators'
Used for sending mails to the moderators of a list.
'3' means 'resend failed list mail'
'4' means 'send to file with recipients'
'5' means 'bounceprobe'
'6' means 'single listmail to single recipient'