problem with one individual not being able to send group emails

Hi, I'm with club 95 Frank E Balmer - 95.toastmastersclubs.org/index.cgi
We use the group email capability each week to notify members of their rolls for the next meeting. This works great, except one person is not able to post to the list. I have deleted her and re-added her and she received the confirmation email and responded to it. However, her posts never reach our members. She is the only one in our club that is having a problem. Her email is 1joywin1@gmail.com. She posts to the list from the same email that is in our member list.
Can you help us?

1) Do not delete and re-add members as you loose all their FTH history.

2) You caused her email to be listed as a member and deleted.

3) She is NOT emailing members-95@toastmastersclubs.org she is emailing server@toastmastersclubs.org