Sharon,
Has the member added their gmail address as an alias on their account?? This should resolve this issue.
Account -> Login setting page -> Advanced settings
Email Alias
If the email service you use for this account sends your outgoing messages from a different address than your account address, please enter your sending address here. Please note: No group email messages or notifications will be sent to this address; group emails and notices from group owners & moderators are sent only to your account address.
Toby
?
?
Toby Kraft