This are just some of the knowledge base articles that you can find searching for duplicate mails in Outlook 2003.

Duplicate junk e-mail messages appear in the Junk E-mail folder in Outlook 2003 ( link).

Duplicate e-mail messages are downloaded from a POP3 e-mail server account in Outlook 2003 ( link).

You are prompted for your password, and you may receive duplicate e-mail messages if your profile has two POP3 accounts in Outlook ( link).

I listed some of them for your convenience in the next paragraph. If you take a look at Microsoft's knowledge base you soon find out that it lists several situations where Outlook may download the same email message more than once. Nevertheless I have to cope with certain situations and one is that Microsoft Outlook creates duplicate emails from time to time due to various 'hick ups'. Some guys at work like the Outlook software and use it at home as well while I'm happy to use Thunderbird at home feeling more at ease with this excellent email client. Next to Microsoft's Internet Explorer 6,Â Microsoft Outlook 2003 is having a top spot on my 'software that I do not want to use but have to' list.

I'm not a big fan of Microsoft Outlook but I have to use it at work because of corporate policy.

Delete duplicates in outlook 2003