The new mailing list system "mailman" is very strict with subscriptions to prevent spammers to flood the mailing lists. If you post to a GRASS list and receive a message similar to:

Subject: Your message to grass5 awaits moderator approval

The reason it is being held:                                                     
    Post by non-member to a members-only list                                    

you are using two different senders. Such message won't come through to the list. Be sure that the "From:" setting is matching your subscription.

What about the "reply to" settings:

If you are annoyed that the "reply" to function of your mailtool send mails back to the original sender instead of the GRASS list, you will have to study the manual of your preferred mailing list software how to manage lists. You will search for a "list reply" function.

Here are some hints for mail software:

• mutt: managing mailing lists, especially list and subscribe entries in .muttrc
• pine: managing mailing lists
• elm: It has separate ``r)eply'' and ``g)roup-reply'' commands. If you want to reply to the author of a message, you strike the ``r'' key. If you want to send a reply to the entire list, you hit ``g'' instead.
• netscape: Use the "Reply to all" button and delete the sender address to avoid multiple copies being sent to the sender (post to list only)
• [your hint]