[Users] Windows save attachment filter action

[Patch Public]

Does Claws mail windows port support a filter rule to save an attachment 
to a specified directory?

Sorry if this is a dumb question but I am new to Claws Mail and I 
couldn't tell if I'm on the right path via the Claws mail documentation, 
manually scanning the last 2 years of this lists posts, experimenting 
with a windows Claws mail installation, or my internet searching skills.

The faq message action documentation suggests a filter action menu can 
be added "Save attachments: munpack -C ~ -- %F" where munpack is 
provided by the mpack package in debian. Does that mean I should install 
CygWin first, then this works on windows also?

Btw, what I'm actually trying to do is process incoming faxes 
efficiently. I use a third party fax server to receive faxes. Received 
faxes are emailed to me as a pdf attachment to an automated email. I'm 
looking for an email client to connect via IMAP, copy the pdf attachment 
to a local file server, then move the processed email to an archive / 
IMAP sub directory. Connecting via IMAP ensures the filtering benefits 
all devices I use to connect to my email account. Moving after the pdf 
is saved  should mean duplicate copies of a fax is more likely than 
missing fax on the file server as a failure  mode. Or at least incoming 
fax emails accumulate in my inbox so are obvious.

I tried to achieve this with thunderbird however the I wasn't able to 
work around thunderbirds limitations 
http://forums.mozillazine.org/viewtopic.php?f=39&t=3025426

Alternatively, is there a better way to automate saving email 
attachments to a file server?