How do i block email from my domain ?

[txn]

I have a domain, but there is an account contactus@mysite.com kept sending email to our email account, how do i trace it ? or stop it ? Thanks
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VERMONT MEDICAL MARIJUANA (http://vermont.dispensaries.org/)

[nobaloney]

Using either SpamBlocker, or the Spam Filters. Spam Filters are probably easier; there's a link from the control panel, but it acts after the spam has been received.

If you use SpamBlocker, built into DA but with no interface unless you buy a third-party plugin (two are available) spam is refused when the sending server first tries to connect.

Jeff