Sanibel Logic LLC

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Disabling Your Domain’s Mail Server Spam Filtering

Sanibel Logic’s server based mail server (SmarterMail) provides incredible spam filtering results; in many cases providing a reduction of 95% of spam.   Should you prefer to rely on client based spam filtering exclusively, as a Domain Administrator you can disable the SmarterMail spam filtering for your entire domain.

Domain-Spam-Filtering-1To start, login to your web based mail interface as Domain Administrator and navigate to Settings / Domain Settings, as illustrated here.  Make sure you have expanded the Domain Settings folder and not the My Settings folder.   Then navigate to Filtering / Spam Filtering.   Select the “Override Spam Settings for this domain” option.

Domain-Spam-Filtering-3Then select the Actions tab, as illustrated here. For low, medium and high probability, select NO ACTION and then depress the SAVE button above to save all changes for both the Options and Actions tabs.

These changes will ensure that all email for your domain is not classified in any way as spam or junk mail at the mail server.

Personal-Spam-Filtering-1However, individual/personal spam filtering settings can override the domain spam filtering settings so it is necessary to check your personal settings to ensure that you are defaulting to the use of the domain spam filtering options.  If you are a Domain Administrator you will see both My Settings and Domain Settings.  Collapse the Domain Settings and expand the My Settings and then navigate to Filtering / Spam Filtering and select the Default Spam Settings and save.

Personal-Spam-Filtering-2If you are not the Domain Administrator, however simply a mail User, then you will see only My Settings, as illustrated here.  Navigate to Filtering / Spam Filtering and select the Default Spam Settings and save.

These steps will ensure that all mail flows through the SmarterMail mail server and is not classified in any way as spam or junk.

Understanding Your Mail Server’s Spam Filtering

Sanibel Logic licenses the Smarter Tools mail server product called SmarterMail.  SmarterMail's antispam features can rid mail servers of up to 95% of all spam.  Third party spam filtering product are NOT necessary when using SmarterMail as a mail server.

Due to the flexible nature of SmarterMail's antispam setup, spam checks can influence the spam decision as much or little as you want. When spam protection runs on a particular email, all enabled spam checks are performed on the email. The total weight of all failed tests is what comprises the spam weight for the email. A spam probability level of low, medium or high probability is then assigned to the email and an action is taken on that message based on its total spam weight. 

An added benefit to SmarterMail's Antispam Administration is the ability to combat both incoming and outgoing spam messages. Most mail servers only allow system administrators to keep spam from entering the mail server. SmarterMail helps protect mail users from incoming spam but also includes the added benefit of keeping mail servers from actually sending spam, thereby helping to protect the mail servers from being blacklisted.

The pre-configured default spam filtering rules for all domains are to move either medium or high spam probability email to the email account’s mail server based junk folder.  Email of low spam probability will be deposited into the Inbox by default.

Spam Probability Action
High Moved to Server Based Junk Folder
Medium Moved to Server Based Junk Folder
Low No Action – Deposited into Inbox
Your domain administrator can easily override the above default spam filtering configuration and take different actions for either of low, medium or high spam weight email.
For example, your domain administrator can configure an override and deposit all mail into an Inbox, regardless of spam filtering probability.   Your domain administrator can also override spam filtering rules and move low, medium and high spam filtering probability mail to the server based junk mail folder.  Moving all of low. medium and high probability to the server based junk mail folder is of course the most aggressive spam filtering approach, however it is an acceptable approach, usually resulting in identifying and diverting 95% of spam.
Spam filtering is not a perfect science, and occasional emails may be incorrectly identified as spam from time to time.  Best practice dictates that your server based junk folder be occasionally checked for incorrectly categorized emails.