[Zope] wherefore art thou NotMail?

i was going to make use of the Bank Holiday weekend by trying out some zope products that i havent had time to play with... and NotMail was high on my list. i managed to install the IMAP server that it needed and went to get the tarball, and it has gone missing from the zope.org site ;p can someone please direct me to where i might find this elusive product. thanks -- best regards, tav