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Outlook Is Trying To Send An Email On Your Behalf - How to Fix the Errors

Updated on June 21, 2015

For sending notification to our clients, we have integrated an application with Outlook. Now, whenever Outlook sends an email, we get an error message that states ‘A program is trying to send email on your behalf’.

This takes a lot of time and is very annoying. Is there any way to work upon this security warning and get this process done seamlessly?

Reason for the Errors

MS Outlook throws back this error if it finds that any add-in or application is trying to access it in an unanticipated or insecure manner. However, the same warning can be received by the user in a different way:

Security prompts are common with any application and when it comes to email clients, any kind of add-in or third party collaboration leads to interruption in its smooth functioning. However, if the virus scanner is up to date, then it is unlikely to have these alerts. But, if everything is working well but still you get the error, then following are some of the actions that can be taken to fix the problem.

Probable Ways to Fix the Problem

#1: Check Out Trust Center Settings

Outlook includes Programmatic Access Security where the user is allowed to set how the Outlook should react when any other program is trying to access it programmatically. For this, you have to do the following setting:

Outlook 2007:

In the Tools menu, choose Trust Center and then Programmatic Access.

Outlook 2010/2013:

In the File menu, drop down to Options. Click on Trust Center and choose Trust Center Settings and then Programmatic Access.

If the first option is chosen (marked in the image below), then warning message will be displayed on screen only if the antivirus is inactive or it is not up-to-date.

The second option will give a security warning pop up if it detects some suspicious activity being done with the database.

Also, make it a point that this configuration settings will be available only when Outlook will be run as administrators. Else, these options will be greyed out. To start MS Outlook with administrator privileges, press the Shift key and right click on Outlook shortcut. You will be provided with the option “Run as Administrator”.

#2: Setting Up Group Policy

The above method can be used when settings are to be done at individual level. However, if changes are to be done within a domain, then that can be done through Group Policies (When working in Active Directory environment, certain policies can be set to a group of users or computers). For restricting security prompts, follow the steps shared below:

Outlook configuration for Group Policy Security Settings:

1) Under the administrative templates, choose the Microsoft Outlook version.

2) Click Security and select Security form Settings.

3) Option-Outlook Security Mode

4) Setting-Use Outlook Security Group Policy.

Settings for Restricting Security Prompt:

1) Administrative Templates, choose Microsoft Outlook version

2) Click Security and choose Security form Settings and Programmatic Security.

These are the troubleshooting steps for the error Outlook is trying to send an email on your behalf. Although security waning is a common phenomenon but with certain changes done in the application settings will prevent such prompts, if the third-party integration is known and reliable.

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