Hi,
I have found a message on this mailing list dated August/2012 in which is said that dovecot could not (at least at that time) do SMTP Authentication using Proxy Features.
http://www.dovecot.org/list/dovecot/2012-August/067998.html is this still true, given i'm using latest stable dovecot, v2.2.5 ? extra informations ... smtp authentication is done by postfix using: dovecot: service auth { unix_listener /var/spool/postfix/private/auth { mode = 0660 user = postfix group = postfix } } postfix: smtpd_sasl_type = dovecot smtpd_sasl_path = /var/spool/postfix/private/auth Thanks ! -- Atenciosamente / Sincerily, Leonardo Rodrigues Solutti Tecnologia http://www.solutti.com.br Minha armadilha de SPAM, NÃO mandem email gertru...@solutti.com.br My SPAMTRAP, do not email it