stan8450

I am running Outlook 2003 on windows XP. I am attempting to send email via a smtp server but keep receiving a 0x80040201 error. I can receive email but not send. It comes back marked 'undeliverable'. I did some research and discovered the .pst files get corrupted quite easily. - I sent test emails as plain text and html. Neither worked. - I have tried to rename the .pst file etc but nothing seems to work. All the settings of this profile are correct as I ran the test and it worked fine. Any help would be appreciated.