LinuxQuestions.org - Mail Server Failing to send Out !

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Mail Server Failing to send Out !

My mail server is not accepting connctions on port 25, hence i cant send out anything from client mail programs. I have restarted my sendmail to no avail. This is the error it gives...PLEASE HELP !

Your server has unexpectedly terminated the connection. Possible causes for this include server problems, network problems, or a long period of inactivity. Account: 'x.x.x.x', Server: 'x.x.x.x', Protocol: SMTP, Port: 25, Secure(SSL): No, Error Number: 0x800CCC0F