Check to be sure that you have the correct mail server name/address set in Outlook, are using the correct SMTP port for your provider (usually 25 but some use 465 for a secured connection), and have the correct password for outgoing mail.
Thanks for revert . I have check all setting ok as per mail server required configuration.
I use same setting in both MSoultook & outlook express. Mails are goning thru Outlookexpress but same is stack at MSoutlook.
I feel Msoutlook has same problem. ???