How do I alter the priority / importance of an e-mail message?

Using CDO.Message, you're supposed to be able to do this: 
 

<!--   METADATA   TYPE="typelib"   UUID="CD000000-8B95-11D1-82DB-00C04FB1625D"   NAME="CDO for Windows 2000 Library"   -->   <%       Set cdoConfig = CreateObject("CDO.Configuration")       Set cdoMessage = CreateObject("CDO.Message")             cdoConfig.Fields.Item(cdoSendUsingMethod) = cdoSendUsingPort       cdoConfig.Fields.Item(cdoSMTPServer) = "mail.server.name"       cdoConfig.Fields.Update         With cdoMessage.Fields            ' for Outlook:          .Item(cdoImportance) = cdoHigh           .Item(cdoPriority) = cdoPriorityUrgent             ' for Outlook Express:          .Item("urn:schemas:mailheader:X-Priority") = 1            .Update      End With        With cdoMessage           Set .Configuration = cdoConfig           .From = "from@from.com"           .To = "to@to.com"           .Subject = "Sample CDO Message"           .TextBody = "This is a test for CDO.message"           .Send       End With         Set cdoMessage = Nothing       Set cdoConfig = Nothing   %>

 
Possible values: 
 

CDO Constant	Numeric Value	Definition
cdoPriorityNonUrgent	-1	Nonurgent priority
cdoPriorityNormal	0	Normal priority
cdoPriorityUrgent	1	Urgent priority
cdoLow	0	Low importance
cdoNormal	1	Normal importance
cdoHigh	2	High importance

 
 
In Outlook Express, I get a little red exclamation mark in the priority column. In Outlook 2003, I get a little note in the preview pane that says, "This message was sent with high importance." I guess even the software has a hard time determining the difference between priority and importance. :-( I haven't tested with other mail clients (Entourage, web-based mail readers, etc). 
 
You can also accomplish this if you use xp_smtp_sendmail from SQL Server (see Article #2403): 
 

EXEC master..xp_smtp_sendmail      @server = N'<enter.mail.server.here>',      @from = N'from@from.com',      @to = N'to@to.com',      @priority = N'HIGH'