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De-activating telnet command

My e-mail server accepts that people outside can execute the command " 25," with which they can send anonymous e-mail with no password. It is possible to close this possibility and to continue sending and receiving e-mail?

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No, not unless you turn off all e-mail services. The SMTP listener (server) must be on port 25 for e-mail to work properly. The server has no way of knowing what CLIENT software was used to connect to it.

For more information on this topic, visit these other searchSecurity resources:
Best Web Links: Secure Messaging

This was first published in February 2002

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