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Old 5th August 2012, 08:29
navneet navneet is offline
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Lightbulb port 25 anonymous mail through telnet

I have setup an email server by following howtoforge guide "http://www.howtoforge.com/perfect-server-ubuntu-12.04-lts-apache2-bind-dovecot-ispconfig-3". Mail server is working perfectly. But the problem is that when someone telnet through port 25 he can send email to internal users without authentication.

I have setup mail server on domain webmail.biz. anyone can connect to that domain via telnet on port 25 and send mails to email id's on same domain like from info@webmail.biz to admin@webmail.biz. I want to stop this anonymous mail sent through telnet. if i close port 25 i don't receive any mail.

Any way to solve this problem.
I need help of this forum urgently
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