Database Mail not sending I'm trying to send email using the DatabaseMail on SQL Server 2008, I can see my emails setting in the 

msdb.dbo.sysmail_unsentitems 


But they just sit there, I get no error messages. 
I've checked I have rights to use the DatabaseMail by using the following TSQL:

EXEC msdb.sys.sp_helprolemember 'DatabaseMailUserRole';


And I have also run 

EXEC msdb.dbo.sysmail_help_queue_sp @queue_type = 'mail';


which shows the length as the number of emails I've tried to send but the Status is still showing as Inactive.

Am I missing something else here?
Had similar issue, for me it got resolved by installing .NET 3.5 and 4.5