I installed sendmail and dovecot on my Fedora core 5 machine. I am using this is my local mail server. It was worked properly but last two days it's shows this error message while sending mail. "Relaying denied. IP name lookup failed [192.168.134.16] Port 25 Secure (SSL)" so I put the IP of windows machine into /etc/mail/access file now it's sending but I can't receive the mails through outlook and it's not showing any error message while receiving. Please help