Posting to the COPASI User Forum is limited to registered members to prevent spamming. To post and reply via the web or email, you will need to have a Google account . If you use any non-GMail addresses, make sure to associate those with your Google account. This will allow you to send e-mail replies to the group and, importantly, have the group automatically recognize you as the same user as from your Google account. You should also be able to set up a non-GMail address as your primary e-mail, when you set up a Google account.
Normally it takes us only a short time to approve your membership.