如何设置对MSSQL 2005数据库邮件的访问？

I've just setup Database mail within MSSQL 2005. I have been able to send email from an administrator account on the server and through a SQL Server Agent job. But, I unable to send email when I tried to send email via a login that just has access to a database for our web application.I've just setup Database mail within MSSQL 2005