"pdf2email.ppd" was obtained originally from:

      http://www.linuxprinting.org/download/PPD/HP/\
HP_Color_LaserJet.ppd

License information:  "pdf2email.ppd"  is  believed  to be  redistrib-
utable under the GPL. This is based on  statements made by the follow-
ing web page:

      http://www.linux-foundation.org/en/OpenPrinting/Database/\
PPDDocumentation

Note: The two URLs listed previously were valid as of  mid-2007.  How-
ever, they may have broken since then.