Mail MIME standard: RFC 2231

http://www.faqs.org/rfcs/rfc2231.html

https://jira.atlassian.com/browse/JRA-12534
http://www.dovecot.org/list/dovecot/2011-September/131279.html

Accounting Database

http://www.databaseanswers.org/data_models/accounting_systems/index.htm

http://www.erpdb.info/accounts-receivable-accounts-payable-conceptual-design/

http://www.experts-exchange.com/Database/Contact_Management/Q_22628303.html

http://dba.stackexchange.com/questions/33706/coding-an-accounting-database-from-scratch


ref
http://www.databaseanswers.org/data_models/


Books

Accounting Information Systems 

 By Ulric Gelinas, Richard Dull, Patrick Wheeler