Custom variable

Hi,

I know that there are some variables (as user or username) I could use 

inside dovecot. They are at https://wiki2.dovecot.org/Variables.

My question is if I can create my own variables from attributes at my 

pass/user db and then use it inside dovecot configuration.

-- Angel L. Mateo Martínez Sección de Telemática Área de Tecnologías de la Información y las Comunicaciones Aplicadas (ATICA) http://www.um.es/atica Tfo: 868889150 Fax: 868888337