when i send mail (Mailing-> New Mailing) the mail won't send and i get this message when i view the mail report
Delivery has not yet begun for this mailing. If the scheduled delivery date and time is past, ask the system administrator or technical support contact for your site to verify that the automated mailer task ('cron job') is running - and how frequently.
The Send Scheduled Mailings from Administer-> System Setting-> Scheduled Jobs is enabled and when i Execute now manually it works fine. The Send test functionality also work fine.