error on sendmail

"Sendmail is only accepting SMTP connections on the following ports : port smtp. Email from other systems on the Internet will not be accepted. This can be changed in the Sendmail Mail Server module."

i got this error message. where to change this?

I don’t have Sendmail setup on my machine here, but you should be able to find the option by logging into Virtualmin, then choosing Webmin -> Servers -> Sendmail Mail Server.

Look in there for a configuration option to change what IP it’s listening on.