Official SuiteCRM Outlook Plugin

Hi Monika,

The winmail.dat file is an Outlook specific file that is created when you send an email using the RTF format. In order to prevent this file from being included as an attachment you can make the following changes in your Outlook settings:

1. Click File in Outlook.
2. Select Options.
3. Go to the Mail category.
4. Make sure HTML or Plain Text is selected for Compose messages in this format: under Compose messages.
5. Now make sure Convert to HTML format or Convert to Plain Text format is selected for When sending messages in Rich Text format to Internet recipients: under Message format.
6. Click OK.

It is however possible that even with these settings that the winmail.dat file can still be sent. In Outlook 2016 you would need to remove the email address you are sending a mail to from your contacts, right click it and select properties. From here you can select "send plain text" under internet format which should resolve your issue.

Thanks.

• SuiteCRM Outlook Plugin Team.

Hi Monika,

Unfortunately this isn't something that can be resolved by the SuiteCRM Outlook plugin as this falls under standard Outlook functionality. I would recommend taking a look at the official Microsoft documentation for more information and possible solutions. Thanks.

https://support.microsoft.com/en-gb/help/278061/email-received-from-a-sender-using-outlook-includes-a-winmail-dat-atta

https://support.microsoft.com/en-us/help/138053/how-to-prevent-the-winmail-dat-file-from-being-sent-to-internet-users

• SuiteCRM Outlook Plugin Team.

Hi Monika,

We've looked further into this issue and determined that unfortunately this isn't something we will be able to resolve. This bug is caused by Microsoft failing to properly implement open standards when dealing with attachments and will need to be fixed on their end.

• SuiteCRM Outlook Plugin Team.

Unfortunately this is an issue we can not resolve due to Microsoft standards and will close this issue.