By editing the message first and saving it, you could reset a particular corruption of the message which allows you to remove it normally afterwards; Open the message by double clicking on it. Place the message in edit mode; Outlook 2003 and previous Choose Edit- Edit message Outlook 2007, Outlook 2010, Outlook 2013 and Outlook 2016. Jun 12, 2014  Hi Clark. In the past I have tried turning on SSL on both the pop and Imap accounts and here is what i get. 5.7.1: Client host rejected: Access denied. Cannot send mail. The SMTP server does not recognize any of the authentication methods supported by Outlook. Microsoft resolves the apprehension of a dependable medium for communication by hosting Outlook email application. Microsoft Outlook is bundled with remarkable features (social media connectivity) that appeal the users most. Sep 24, 2018  This issue occurs because the MoveItem operation in the Microsoft Exchange Web service returns an incorrect ChangeKey property of a moved item when Exchange Server synchronizes items with Outlook for Mac 2011 clients. Nov 23, 2019  Careful! This time size is in kilobytes (Kb). Also do note, Entourage and Mac Outlook 2011 clients encode attachments in MIME. This encoding increases the size of the attachment by about 33%. Entourage and Mac Outlook 2011 show the size of the expanded attachment in the GUI. This size further expands to additional 33% by Exchange server. May 20, 2011 Please note that for some reasons autodiscover is not working in Outlook 2011 for Mac. It works in Outlook 2010 on Windows. So i am manually putting in the server name in Outlook 2011 as. During the account setup.

In Outlook, you may receive the error message – “An unknown error has occurred” when you attempt to read, send, receive or delete an email. In this case, you can take the following actions to fix it.

This error is the most common one in Outlook. Once it occurs to your Outlook application, you may not even be able to access the Outlook file. That is to say, you cannot read, send, or do other operations to Outlook items until you fix the unknown error thoroughly.

1. Check Your Email Account Settings

First of all, you would be required to check your email account settings to verify whether some configuration goes wrong. You can go to “File” menu and click “Account Settings” button. In the subsequent window, click “Change” button to see the concrete settings.

2. Create a New Outlook Profile

Provided no faults exist in account settings, you need to consider whether your Outlook profile is corrupt. Thus close Outlook application and go to start menu. Open Control Pane and select “Mail” icon. Next in the new dialog box click “Show Profiles”. Press “Add” to create a new profile. After creating successfully, restart Outlook and deleted the older one.

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3. Remove Outlook Add-ins

If still no result, you need to remove Outlook add-ins. At times, it is the innocuous add-ins that leads to Outlook errors. In order to remove add-ins, you should run Outlook as administrator. Then go to Outlook Options and click “Go” button under “Add-ins” tab. In the next dialog, you can remove add-ins.

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4. Utilize Antivirus Software Scanner

As the above three methods all fail, you should think about the possibility of Outlook file corruption. Perhaps your antivirus software is out of date, so it cannot prevent viruses or malware effectively. Therefore, upgrade your antivirus software and apply it to scan your Outlook file.

The above 4 means are preliminary means to deal with the unknown error. Virtually if Outlook file is compromised seriously, you have no choice but to resort to repair tool.

5. Apply Outlook Inbox Repair Tool – ScanPST.exe

Outlook is loaded with a built-in repair tool, namely Scanpst.exe. It can repair damaged Outlook file at times. You can access it by searching it in Windows Explorer. After running it, click “Bowser” to select the target Outlook file and press “Start”.

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6. Procure an External Outlook Repair Tool

But assuming that Scanpst.exe isn’t competent enough to repair the file, you can also get hold of an external repair tool like DataNumen Outlook Repair. I have to admit that although this tool is developed by third party, it have a much better performance than inbox repair tool. Apart from repairing Outlook file, it can also split oversized file, recover deleted items and so on. Furthermore, due to its high recovery rate, it has shouldered over its opponents.

Author Introduction:

Shirley Zhang is a data recovery expert in DataNumen, Inc., which is the world leader in data recovery technologies, including sql recovery and outlook repair software products. For more information visit www.datanumen.com