Você pode copiar o arquivo .emlx da sua pasta de Correio.
tell application "Mail"
set msgs to selection
if length of msgs is not 0 then
display dialog "Export selected message(s)?"
if the button returned of the result is "OK" then
set theFolder to POSIX path of (choose folder with prompt "Save Exported Messages to..." without invisibles)
repeat with msg in msgs
-- determine date received of msg and put into YYYYMMDD format
set msgDate to date received of msg
-- parse date SEMversion below using proc pad2()
set {year:y, month:m, day:d, hours:h, minutes:min} to (msgDate)
set msgDate to ("" & y & my pad2(m as integer) & my pad2(d))
-- assign subject of msg
set msgSubject to (subject of msg)
-- create filename.eml to be use as title saved
set newFile to (msgDate & "_" & msgSubject & ".eml") as text
set newFilePath to theFolder & newFile as text
set newFilePath2 to theFolder & newFile & "x" as text
-- copy mail message to the folder and prepend date-time to file name
set messageId to id of msg
set myFolder to POSIX path of (account directory of account of mailbox of msg as text)
do shell script "find " & quoted form of myFolder & " \( -name \"" & messageId & ".eml\" -a -exec cp -a {} " & quoted form of newFilePath & " \; \) -o \( -name \"" & messageId & ".emlx\" -a -exec cp -a {} " & quoted form of newFilePath2 & " \; \)"
end repeat
beep 2
display dialog "Done exporting " & length of msgs & " messages."
end if -- OK to export msgs
end if -- msgs > 0
end tell
on pad2(n)
return text -2 thru -1 of ("00" & n)
end pad2