On 24.07.2012 09:16, Arnaud Abélard wrote: > And first of all, even if this is not dovecot related, use a > greylisting solution. No, greylisting is really a bad solution. It is not RFC compliant and delays the mail traffic. I would prefer a pre-queue content-filtering solution like MIMEDefang or amavisd-new. Best regards, Morten