I installed ISPconfig. I m trying with outlook or with telnet and with webmail to send a mail. however I can receive mail but can't send why When I use to Telnet I connect via outlook. when I send mail that outlook ask username and password, again and again. when I connect from outlook. I follow tail with mail.log this is tail -f mail.varn this is my main.cf this virtualhost table this virtual-host-names this DNS make me a crazy. please help. Note: I can send mail same adres mail from: email@example.com rcpt to: firstname.lastname@example.org etc.