spacing is really important
Support configuration of original message delimiters

Example app config XML:

  <configSections>
    <section  name="HistoryOriginalMessageExpressions" type="System.Configuration.AppSettingsSection" />
    <sectionGroup name="NUnit">
      <section name="TestRunner" type="System.Configuration.NameValueSectionHandler"/>
    </sectionGroup>
  </configSections>
  <HistoryOriginalMessageExpressions>
    <add key="1" value="(?i)-+\s*Original Message\s*-+"/>
    <add key="2" value="(?i)On .*,.*wrote:"/>
    <add key="3" value="(?i)&lt;div style=3D'border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =0in 0in'&gt;"/>
  </HistoryOriginalMessageExpressions>

For: DovetailSoftware/agent#1009