Some links to useful information

Hotmail's pdf on deliverability issues: http://download.microsoft.com/download/e/3/3/e3397e7c-17a6-497d-9693-78f80be272fb/enhance_deliver.pdf
Microsoft list of helpful email addresses and some they recommend:

http://www.microsoft.com/senderid
http://postmaster.live.com
http://microsoft.com/postmaster
http://postmaster.live.com/guidelines.aspx
http://privacy.microsoft.com/en-us/anti-spam.aspx
http://microsoft.com/safety

FTC GUIDELINES FOR BUSINESSES : http://www.ftc.gov/bcp/conline/edcams/spam/business.htm
AUTHENTICATTION AND ONLINE TRUST ALLIANCE (AOTA) www.aotalliance.org
DELIVERABILITY http://www.deliverability.com/
ESPC http://www.espcoalition.org
SENDER SCORE CERTIFIED PROGRAM http://www.senderscorecertified.com


CAN SPAM ACT info http://www.ftc.gov/bcp/conline/pubs/buspubs/canspam.shtm

Enroll in Microsofts Junk Mail Reporting Scheme http://postmaster.live.com/Services.aspx#JMRPP