Dear administrators,

I removed the email, and I can not add a group, alias, or even create the email again.

Maybe it will help... on the Control Panel...

User Details ->  contato@marcenarianc.com.br -> Mail Accounts -> This user does not have a mail account.

Please add a mail account  contato@marcenarianc.com.br to user  contato@marcenarianc.com.br, or completely erase this user, thus I can add it again.

Thank you very much.