Are you using SQL mail (sp_send_dbmail)? If so, you can use the mail status table in msdb to check on the status of any email. Look at the "sysmail_%" views.
SQL DBA,SQL Server MVP(07, 08, 09) Prosecutor James Blackburn, in closing argument in the Fatal Vision murders trial: "If in the future, you should cry a tear, cry one for them [the murder victims]. If in the future, you should say a prayer, say one for them. And if in the future, you should light a candle, light one for them."