There is a great article on Mail.dat benefits and use in the October issue of the Mailing & Fulfillment Service Association’s publication PostScripts, written by Joe Bailey of Monticello Software. If you are a MFSA member, be sure to check it out.
If you are not an MFSA Member, you should be! MFSA delivers timely, topical information critical to mailers. View their website here: http://www.mfsanet.org
For those of you who are not MFSA members, feel free to contact me with any of your general Mail.dat questions, and I will help as I can. We can also send you a generic IDEAlliance-produced brochure on Mail.dat, to help educate you and your team on this Industry standard for electronic mailing information, upon request.