Parsing Email 'References' header.

[Aspersieman]

Hi

I have a python script that parses email headers to extract information 
from them. I need to get the _last_ messageid in the 'References' field 
(http://cr.yp.to/immhf/thread.html) to create a threaded view of these 
emails (these messageid's are stored in a database).

Now, I can easily access the 'References' field using the python 'email' 
module, but I need a regular expression to get the last messageid in the 
'References' field.

Here's what I have so far:
<code>
rx_lastmesgid = re.compile(r"(<.+>$)")
lastmesgid = "".join( filter( rx_lastmesgid.match, parentid ) ) # 
parentid's value is 
eg:"<1 at mail.gmail.com><2 at mail.gmail.com><3 at mail.gmail.com><4 at mail.gmail.com><5 at mail.gmail.com>"
lastmesgid = "".join( filter( rx_lastmesgid.match, parentid ) )
</code>

I need it to return "<5 at mail.gmail.com>"

Can anyone help?

Thanks

Nicol

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