How To Fix Outlook Express Error 0x800CCC90


Error 0x800CCC90 is one of the most common problems that people face while using Outlook Express. The problem is not very complicated but can have serious hassles if not resolved. Error 0x800CCC90 can make an account inaccessible and you may not be able to access any of your mails nor send any online correspondences through the account.

The Outlook Express error 0x800CCC90 is caused due to an authentication problem. When your account details that have been furnished are not authenticated by the server, you would have this error 0x800CCC90 popping up. Typically the message is, “There is an issue visiting your mail server. Your User Title was declined. Account: ‘’, Server: ‘’, Protocol: POP3, Server Response: ‘-ERR’, Port: 110, Secure(SSL): No, Server Error: 0x800CCC90″.

Now, the authentication problem can itself be caused by various factors. Your password may have been wrongly furnished. Either you have entered the wrong password or there are some factual errors such as typographic mistakes or font issues if your server’s password settings are sensitive to higher and lower case characters. It may so happen that your server is unable to authorize access because your account details do not exactly match the details of the server that you are trying to connect to. In many instances, wrong account settings, different from the username and password, or various specific properties of the POP3, SMTP or IMAP settings may cause the error 0x800CCC90.

Fixing the error 0x800CCC90 on Outlook Express is simple. You have to go to your account settings and ensure that your username and password are entered correctly. There should be no typo mistakes or any other mistakes while entering these details. Once you have ensured the accuracy of your username and password, you must crosscheck the server details and the various addresses of POP3, SMTP or IMAP settings.

You can get the server settings from your network administrator or the host of your mailing service. Even if you are aware of the settings yourself, it is always better to crosscheck the details with the administrator so you do not go wrong anywhere. The error 0x800CCC90 will make your entire mailbox and correspondences inaccessible, hence, sorting it out properly should be your primary objective. Your account name should also comprise of the server and domain details in the order – ‘domain-nameaccount-nameserver-alias’.

To get to your account settings, you should check the Tools menu and go to properties and thereon the servers tab.