http://www.microsoft.com/exchange/2010/en/us/Archiving-and-retention.aspx

http://www.decatec.it/blogs/2007/04/21/Sharepoint+2007+Email.aspx
http://blogs.msdn.com/joelo/archive/2007/10/23/email-enabled-lists-and-inbound-email.aspx
http://www.gilham.org/blog/Lists/Posts/Post.aspx?ID=14
http://blogs.msdn.com/neilth/archive/2007/10/26/sharepoint-2007-incoming-email.aspx
http://www.toddklindt.com/blog/Lists/Posts/Post.aspx?ID=31

POP3 Mail Web Part (Coming Soon !!) !!

http://rapidapplicationdevelopment.blogspot.com/2007/04/multi-value-columns-in-sharepoint.html

How to configure Sharepoint for incoming email (or getting the POP Mail Web Part or Decatec Outlook Sharepoint Connector )

http://www.toddklindt.com/blog/Lists/Posts/Post.aspx?ID=31
http://mindsharpblogs.com/bill/archive/2006/06/28/1157.aspx
http://jopx.blogspot.com/2006/11/configuring-incoming-email-settings-in.html
http://weblogs.asp.net/erobillard/archive/2005/09/14/425235.aspx
http://coppercoins.spaces.live.com/blog/cns!E15FE96DB520E62C!119.entry
http://www.sharepointblogs.com/tonstegeman/archive/2007/02/02/18861.aspx
http://www.sharepointblogs.com/mindykelly/archive/2007/02/19/incoming-email-on-moss-2007.aspx
http://www.wildwires.com/Blog/PermaLink,guid,900b25b6-d27f-4c55-9335-ce878ceae64a.aspx
http://msmvps.com/blogs/obts/archive/2006/10/30/229077.aspx

http://blogs.msdn.com/publicsector/archive/2007/05/07/document-workflow-in-moss-2007-enable-the-portal-to-receive-external-emails.aspx

How to send email with Sharepoint 2007 (and incoming email)

http://blogs.microsoft.fr/rlondner/articles/7089.aspx

SharePoint's out-going e-mail with Exchange 2007

http://msdn2.microsoft.com/en-us/library/microsoft.sharepoint.utilities.sputility.sendemail.aspx

http://clintcherry.spaces.live.com/Blog/cns!AEC0DCBC460E45B9!535.entry

Sending mail from SharePoint

Decatec Outlook Sharepoint Connector