The Last Reply filter which can be found in Set Start & End Position Define End Position After most recent reply will let you extract the last reply from an email body text.
The filter searches for common patterns which are added by email clients when replying to an email. Some examples of patterns the algorithm is looking for are:
- -- (Signature Breaks)
- From: ...
- On , <name+email> wrote:</name+email>
- Send from iPhone / iPad / Windows Mail.
If none of the patterns are matching, the algorithm will search for two consecutive empty lines. If this doesn't match, the whole body text will be returned.