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How to Prevent WINMAIL.DAT attachments

Nov 22

Written by:
Tue, 22 Nov 2011 09:42:15 GMT  RssIcon

The Cause...

The WINMAIL.DAT attachment is generated when a Microsoft Outlook client sends a html/richtext e-mail containing an attachment to a non-Outlook client such as AOL Mail, G-Mail, Eudorra etc. The reason behind this is that Microsoft Outlook adds additional formatting information to the header of the e-mail - this can often be incorrectly translated by the receiver's E-mail client and the result is the original attachment is wrapped within the dreaded WINMAIL.DAT. In our experience this only happens when there is an attachment in the equation. 

The Solution...

Send as Plain Text

The easiest is to send your E-mail in plain text format. To do this in Microsoft Outlook 2010 when replying or composing a new message click the 'Format Text' tab and select 'Aa Plain Text' - if you receive any warnings about losing formatting simply click continue - this means that any fancy formatting applied to text or any images embedded in the e-mail such as in signature blocks will no longer display (just like typing in Notepad). See the below:


You can also choose to set all outgoing mail as plain text by going to 'File' in the main Outlook display (not in new or reply to message) and selecting 'Options' then select 'Mail' on the left hand column and under the heading 'Compose Mail' select 'Plain Text' from the drop down. In older versions of Outlook you can set this by selecting 'Tools' then 'Options...' from the menu - Go to the 'Mail Format' tab and under the heading 'Compose in this message format:' make sure Plain Text is selected and click 'OK' to accept the changes.

Other work arounds

There are a number of work arounds to this issue - that involve a lot more work - for more info or help on this issue please Contact US

Please Read:

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1 comments so far...


This totally helped me out on step 2! thanks for this guys

By Jake on   Tue, 22 Nov 2011 13:46:20 GMT

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