When the text of an html message is encoded. For example, text outside an html tag is considered encoded when it is in the format of &#ddd where ddd is a decimal number in the range: 48-57, 65-90, or 97-122.
Example
In an effort to get around antispam tests, the following encoding:
<i><strong>There is no
consultation
fees and
absolutely no
obligation.
You will
be amazed at
the rates we
can
provide.</strong></i>
Displays the following message:
There is no consultation fees and absolutely no obligation. You will be amazed at the rates we can provide.