Here is an AppleScript I wrote to create a digest from any number of selected emails.
-- Begin AppleScript -- Combine emails into a digest -- This script takes any number of email messages an puts them into a digest -- -- By Wayne Brissette -- 2007-08-09 set AppleScript's text item delimiters to {""} set TID to AppleScript's text item delimiters set MySenderAddress to {} set MySenderName to {} set MySubject to {} set MyContents to {} set MyMessageDate to {} set mydivider to return & "------------------------------" & return set MessageIndex to "" set MessageBody to "" set mycount to 0 set dateTid to "Date: " try tell application "PowerMail" set MyMessage to current messages repeat with i in MyMessage set TheSender to (sender of i) set TheSenderAddress to (email address of TheSender) set TheSenderName to (display name of TheSender) set TheSubject to (subject of i) set TheHeaders to (headers of i) set theContents to (content of i) (* Build the date field *) set tempHeader to (headers of i) set AppleScript's text item delimiters to dateTid set TheDate1 to text item 2 of tempHeader set AppleScript's text item delimiters to return set TheDate to text item 1 of TheDate1 set AppleScript's text item delimiters to TID (* Put into groups here *) set MySenderAddress to MySenderAddress & TheSenderAddress as list set MySenderName to MySenderName & TheSenderName as list set MySubject to MySubject & TheSubject as list set MyContents to MyContents & theContents as list set MyMessageDate to MyMessageDate & TheDate as list end repeat end tell (* Build Email *) set myrevcount to count of items in MySenderAddress repeat with i in MySenderAddress set mycount to mycount + 1 set Newcount to mycount as text set MessageIndex to MessageIndex & Newcount & ". " & item myrevcount of MySubject & return & " " & item myrevcount of MySenderName & " <" & item myrevcount of MySenderAddress & ">" & return & return set MessageBody to MessageBody & mydivider & return & "From: " & item myrevcount of MySenderName & " <" & item myrevcount of MySenderAddress & ">" & return & "Subject: " & item myrevcount of MySubject & return & "Date: " & item myrevcount of MyMessageDate & return & return & item myrevcount of MyContents & return set myrevcount to (myrevcount - 1) end repeat set MyContents to "Index of Messages" & return & return & MessageIndex & return & MessageBody (* put into a new message *) tell application "PowerMail" set msg to make new message with properties {content:MyContents} open msg activate end tell on error set AppleScript's text item delimiters to TID end try -- end AppleScript -- "Somebody's dead forever..." - Somebody Got Murdered -- Joe Strummer (1952-2002)