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Why do I receive a file winmail.dat when other MAC devices get a regular attachment?

I'm going crazy over this one. About a month ago, my partner's email attachments began appearing as (unreadable) winmail.dat. I've the issues on this forum, about rich text vs. plain, etc. But I can't understand why on my Mac devices (laptop, ipad, iphone) they come through like this, while on my friend's device, they come through as .doc or pdf or photos.


Do I need to adjust a setting?


I use me.com (icloud). When I forward to gmail, I can download. But I shouldn't have to forward to gmail to get the info.


Any wisdom would be wonderful!

Posted on Dec 25, 2011 9:09 PM

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Posted on Oct 31, 2015 5:36 PM

I tried something very simple that worked.


I have outlook and messages sent to two different users at the same time have a different result. I can see the attachments but my wife cannot.


as indicated, it does appear to have to do with the contact info in the outlook client.


as you start to type the recipients email address when creating an email, you will see a list of previously used addresses. to the right and beneath where you are typing is an "X" so you can tell outlook to forget that pre-saved address. click the x, trash the email, the create a new email. when typing the address, it should NOT default this time, but will in the future.


deleting this pre-reserved address appears to have solved the problem for us.


good luck

54 replies
Question marked as Best reply

Oct 31, 2015 5:36 PM in response to rebz

I tried something very simple that worked.


I have outlook and messages sent to two different users at the same time have a different result. I can see the attachments but my wife cannot.


as indicated, it does appear to have to do with the contact info in the outlook client.


as you start to type the recipients email address when creating an email, you will see a list of previously used addresses. to the right and beneath where you are typing is an "X" so you can tell outlook to forget that pre-saved address. click the x, trash the email, the create a new email. when typing the address, it should NOT default this time, but will in the future.


deleting this pre-reserved address appears to have solved the problem for us.


good luck

Dec 25, 2011 9:50 PM in response to Linc Davis

I appreciate the reply.


But it relly doesn't answer the question. Why do others receive the email the right way while I receive it the wrong way? Send from same user. Received on similar devices.


I downloaded "enough" yesterday. Perhaps I am using it wrong, but it seems to take extra steps to see each download. Further, im not sure how is works when viewing from my iPad/iPhone!

Jan 23, 2012 2:28 PM in response to rebz

I am having the exact same issue. Both me and my partner use our company's email. He gets copied on my same message. In my iPhone and in my MacBookPro I see

www.tetratech.com<blocked::http://www.tetratech.com/> | NASDAQ:TTEK


In his iPhone and in his MacBookPro I see a nice signature block with different colors, font, and no

<blocked::http://www.tetratech.com/>


We both have OSX Lion and iOS 5 (latest versions). I checked ALL settings in Apple Mail and in Gmail (our email provider) and they were IDENTICAL.


I started having this issue after upgrading to Lion back in September, but he didn't (he upgraded a few weeks ago).


What's going on????

May 17, 2012 1:14 AM in response to Linc Davis

This link says that the email, sent by Outlook is rich text and cannot be opened by Mac Mail. This is not true - other users on Macs besides me get normal attachments. Same OS, and Mac mail versions and the same email from the outlook user. I only get Winmail.day and they get the contents of win mail.


Why is Mac Mail doing this?


The only other factor is my email address is an AOL account had the other users are on a proivate web address but still using Macs.

Why do I receive a file winmail.dat when other MAC devices get a regular attachment?

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