Haviland Broadband provides spam prevention on our email server. Unfortunately, spammers change tactics as often as possible to avoid detection and it is a game of cat and mouse. The spam detection rules are automatically updated on a regular basis in both filters to catch as much spam as possible while minimizing "false positives", or good email being trapped.
To help the spam filter improve, sign into the webmail at mail.havilandtelco.com. Click on the message you want to report, then click the "Report this message as spam" icon in the top right corner (it looks like a stop sign with an exclamation point in it). You can also move the email to the Spam folder in your email client if there is one.