Anti-Spam
The impact spam has is enormous: it takes time to delete; is a distraction from reading important email; takes up network resources to store the email messages and bandwidth to receive, deliver and bounce messages; and it can be offensive. Our new anti-spam features include:

Connection Filtering

  • Real-time Blackhole Lists (RBL) lists third party services that include domain names and IP addresses of known spammers; Comes with 5 free RBL lists by default and can be configured with additional ones by the administrator like ORDB or MAPS
  • Verify the MAIL FROM validates that the MAIL FROM address actually exists.
  • Perform Reverse DNS Lookup verifies the DNS record for the sending servers IP address.
  • Verify the EHLO/HELO domain validates that the sending mail server domain exists in DNS.
  • Kill Lists (block by domain or email address)
  • Trusted IP Addresses

Content Filtering

  • Bayesian statistical filters use spam’s characteristics against itself. Words are analyzed based on how frequently they appear in good email versus bad email. Then the message is assigned a probability of being spam.
  • Phrase Filtering searches for phrases in the body of the messages.
  • Trusted IP Addresses & White Lists of trusted e-mail or IP addresses that will allow messages through, minimizing false positives.
  • Advanced HTML Filtering
    • Detects nested tables, hyperlinks, images, scripts, invalid tags, mailto links, deceptive URLs, and embedded comments
    • Blacklists URLs that appear in spam messages (most spam emails contain a call to action to visit a web page and these URLs can now easily be blocked)
    • Removes the HTML tags prior to the statistical analysis of the words in the message (useful when dealing with embedded comments or invalid tags that are used to intentionally confuse statistical filters)

Delivery Rules

New outbound rules capability helps administrators eliminate obscene language and stop confidential information from going out. Combination rules help prevent viruses from entering the network and they cut down on spam. And you can also reduce spam by disallowing the creation of subfolders that are often byproducts of spam.

Relay Prevention

Spammers want to hijack your company's mail server to launch their junk mail - at your expense - often making you look like the source of their spam. Now you can curb e-mail abuse before it wastes your valuable time and network resources. Unsolicited mail is blocked and prevents your system from being used as a relay by junk mailers.

To add this anti-spam feature to your email, contact us today sales@mshost.net