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 Home » MailScan for SMTP » If a host has an SMTP Server installed
 MailScan for SMTP Servers
 AntiVirus and Content Security at the Mail Gateway 

How to find out if a host has an SMTP Server installed?

Type the following on the command-prompt: telnet host_name 25

If you get a response, then an SMTP server is installed and active on the host. If you do not get a response, then either an SMTP server is not installed or the SMTP server is inactive.

Instead of host_name, you can also specify the TCP/IP address of the host_name.

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