All I know is they involve base 64 encoding of information. This is likely used for archive compression, and perhaps mailing too. Encoding can introduce some fill characters, which then come back once the data is read. It would be nice if one of our members could tell us more about that. tactilelady wrote: >John what are mime types? >+++++++++++++++++++ > > -- Regards, John Durham <http://modecideas.com/contact.html?sig> ICQ number 112663246 Fax/Phone 64 4 5286786 Award winning web site at http://modecideas.com?sig Order my latest e-book at http://modecideas.com/dmaxhits.htm?sig PC-HELPERS list subscribe/unsub at http://modecideas.com/discuss.htm?sig Good advice is like good paint- it only works if applied. Regards, John Durham (list moderator) <http://modecideas.com/contact.html?sig> Freelists login at //www.freelists.org/cgi-bin/lsg2.cgi List archives at //www.freelists.org/archives/pchelpers PC-HELPERS list subscribe/unsub at http://modecideas.com/discuss.htm?sig Good advice is like good paint- it only works if applied.