search for: isp_mistak

Hello, I''m new in the list. I''ve installed Mandrake MNF and it works fine but I''ve a problem in sending emails. Small text mails can go out but bigger ones, with attachements, have problems. My network is formed by Windows workstations and only the firewall is a Linux box. The first simptom is the reaching of ISP''s server time out and then my mail client goes in