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Atatchments changing to winmail.dat

Posted on 2014-04-07
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Last Modified: 2014-04-19
I am emailing .pdf attachments from outlook 2013 to Verizon and yahoo clients and both are getting the attachment as winmail.dat. I have changes the format from HTML, to Rich Text to Plain text and no fix yet.
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Question by:jsgrosskopf
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Expert Comment

by:zulea
ID: 39985847
You as the sender will need to change the format of your outgoing email to plain text (or possibly HTML). Microsoft says that your outgoing email is being formatted as Rich Text. They have a problem sending Rich Text encapsulated with the Transport Neutral Encapsulation Format. (They don't seem to explain why they do or if they are planning on fixing it). In Outlook on the tools menu choose Option and then Mail format. In the section called Compose in this message format choose Plaint Text and hit OK. If you have a contact for his person you can also edit the check the settings for that person and make sure the SMTP-General section in the PAB (if they are in your PAB) has the Always send to this recipient in MS Exchange Rich Text check box cleared. This KB is titled for 2007 and 2010 but I have 2013 with Exchange 2010 and have the same issues. http://support.microsoft.com/kb/958012/en-us

Hope that helps.
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Accepted Solution

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jsgrosskopf earned 0 total points
ID: 39998651
It looks like the problem derived from the outlook quicklist when sending an email YOu know how when you send to a frequent email address in outlook, a list pops up so you do not have to retype the whole email? Well in this case, the user had a new profile created but the quicklist was still there and this user was having the .dat issues. I deleted the email from the quicklist and re-entered it and the attachments worked again. Have no idea what is the exact cause, but this fix worked for me.
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Author Closing Comment

by:jsgrosskopf
ID: 40010150
Fixed issue
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