pattern1.xml

<note>
<pattern>"(V14R01M7.)(\d+)[^\s][^\d+.\d+]"</pattern>
<releasetrack>1.7.1</releasetrack>
</note>

pattern2.xml

<note>
<pattern>"(V14R01M7.29.)\d+"</pattern>
<releasetrack>1.7</releasetrack>
</note>


powershell-code
foreach (patternfile in collectionOfPatternfiles)
{
	regexpatterenFromFile = patternfile.note.pattern
	releaseversion = regex.match(subjectOfEmail, regexpatterenFromFile)
	if (regex.match == true)
	{
		UpdateReleasetrackInOctopus -NewReleaseVersion releaseversion -Releasetrack patternfile.note.releasetrack
	}
}