Filter Settings: Domain

Content Filter Settings Domain-wide

The Administrator can select default settings for the entire domain. If the settings for a particular mailbox are not deliberately selected and modified, it will use these settings.


Spam Filter Settings

The Anti-Spam filter settings have the most options. You can choose from various presets for filtering, or customize your own, with any level of granularity.

Messages that are spammy can be delivered with their subject lines rewritten. Spam messages can be quarantined. And you can choose the score at which each of those happens. Our standard setting quarantines mail at a score of 7.0. But you might want to make this number higher or smaller, or add the option to rewrite the subject. It's entirely in your control.


Anti-Phishing Filter Settings

Adjust filters to increase scoring rules of phishing emails.  'Normal' is our standard weighted setting. 'High' and 'Extreme'  increase the sensitivity of the filters. Keep in mind, increasing the filter sensitivity will cause an increase of false-positives. 
To report any phishing emails that have come through the filters, attach a copy of the original email body and header to or paste the original email body and header in the space provided and click submit.


Anti-Virus Filter Settings

Your options for virus-infected emails are much simpler: Do you want to be notified when a virus-infected message is quarantined?


Message-Size Filter Settings

You can opt to reduce the maximum allowed message size for your email. Our maximum is 150MB.


Banned File Types Filter Settings

Banned File Types are messages that contain various types of dangerous enclosures. The standard filetypes blocked by this filter include: .bat, .cmd, .com, .cpl, .dll, .exe, .pif, .scr, .rar, and .vbs.

These restrictions apply to files embedded inside other files, like zip or tar files too.

Besides quarantining these emails and deciding if you want a notification, you can allow them to be delivered. You can even set a "plus extension" for delivery, so you can have the message delivered to a variant of your email address, like Some people like to use this to support client-side filtering.


Bad Headers Filter Settings

The Bad Headers filter has the same options as those for the Banned File type filter. Bad headers are messages that violate the internet-standard RFCs. The checks include verifying the MIME structure of an email message, checking for control characters (like NUL and CR), looking for improperly encoded 8-bit characters in an email header (per RFC 5322), and headers longer than the maximum allowed length of 998 characters (per RFC 2822).

Of all the things here, this is the one most likely to have a false positive, particularly with various mailing lists. You might opt for delivery of these messages. Or deliver it with an extension. Or, if you do want to quarantine it, enable the notification option shown below.



Preferred Languages 
When a message comes in, we try to classify the language used in the body of the message.  This isn't always possible - it could be too short, or ambiguous, or it might be encoded in some fashion.  But we are able to identify it a good portion of the time.
"Preferred Languages" lets you specify the languages you prefer to accept - languages not in your list will have a penalty applied to them, causing the to score higher, and to be more like to enter, or be guaranteed to enter the quarantine.
The default setting is to allow All languages:PastedGraphic-62-1.png
If you delete the "All" entry from the list by clicking the small x next to it, then you can choose specific languages you prefer:

The default penalty for a message with an identified language that does not match your personal list, is 5 points.  You can increase or decrease this to whatever you prefer.  Picking a number substantially higher than your quarantine cutoff point (default is 7.0) will make sure those messages go to the quarantine, unless they are overridden by a whitelist entry.





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