Sender address rejected: need fully-qualified address (in reply to MAIL FROM command) [RESOLVIDO]

agnushallard
(usa Debian)

Enviado em 10/11/2010 - 10:58h

Usando o phplist para mandar mensagens para uma lista de usuarios. O que poderia estar causando este erro

Sender address rejected: need fully-qualified address (in reply to MAIL FROM command)

MAIL FROM seria o campo De: do email??