Invalid Tags

Spammers sometimes insert the message text inside invalid HTML tags in an attempt to confuse statistical word filters. This is because the text, in the invalid tag, is treated as non-spam words and they balance out the spam words. Some examples are shown below:

Examples:

• <comment>Get Rich Quick</comment>

IMail Server treats all non-standard comment formats as invalid tags.

• <Get paid to work from home. Respond now for information on this fantastic offer. There are a limited number of available positions, so don't miss out. Respond Now!>

In the example above, text e-mail clients hide the message because it appears within an invalid HTML tag.

If you select the Invalid Tag option in HTML Feature Filtering, messages containing this type of spam trick will be identified as spam.

Note: IMail Server considers any tag that is not HTML 4.0 compliant to be an invalid tag.