Solved

Outlook sends .pdf files as .dat

Posted on 2016-07-18
5
37 Views
Last Modified: 2016-07-19
Sometimes when I send a .pdf file as an email attachment in Outlook 365, the recipient gets a .dat file instead of a .pdf.   How do I prevent this?
0
Comment
Question by:DoctorK12008
5 Comments
 
LVL 14

Expert Comment

by:Edward Pamias
ID: 41717420
Try using HTML as the email format instead of rich text.

To prevent Outlook from attaching winmail.dat when you send an email:

    Click File in Outlook.
    Select Options.
    Go to the Mail category.
    Make sure HTML or Plain Text is selected for Compose messages in this format: under Compose messages.
    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.
    Click OK.
1
 
LVL 52

Expert Comment

by:Joe Winograd, EE MVE
ID: 41717437
Hi DoctorK,
This is a very common, nasty problem, and there is no one solution that works for everyone. If you search EE by putting "winmail.dat" in the search box above, you will get 921 hits with thousands of views among them. I suggest reading some of those threads and trying some of the fixes that worked for other members, but this is definitely a YMMV (Your Mileage May Vary) issue.

I've participated in many questions here at EE on this same problem. Here are several of them:

http://www.experts-exchange.com/Software/Server_Software/Email_Servers/Exchange/Q_28616021.html

http://www.experts-exchange.com/Software/Office_Productivity/Groupware/Outlook/Q_28129365.html

http://www.experts-exchange.com/Software/Misc/Q_28199110.html

http://www.experts-exchange.com/Software/Server_Software/Email_Servers/Exchange/Q_28605102.html

http://www.experts-exchange.com/Software/Office_Productivity/Groupware/Outlook/Q_28512378.html

I hope one of these has a solution that works for you. Regards, Joe
0
 
LVL 42

Accepted Solution

by:
Jackie Man earned 500 total points
ID: 41718089
Agreed.

Have a look of my answered question below also.

O365 and winmail.dat file
https://www.experts-exchange.com/questions/27778217/O365-and-winmail-dat-file.html
1
 

Author Comment

by:DoctorK12008
ID: 41719107
Both answers very helpful.   Thank you.
0
 
LVL 52

Expert Comment

by:Joe Winograd, EE MVE
ID: 41719400
> Both answers very helpful.   Thank you.

You're welcome. But if "both answers [were] very helpful", why did you mark just one of them as a Solution?
0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

What does UTC stand for?  “Coordinated Universal Time” – Think of this as the true time on Planet Earth that never changes with the exception of minor leap seconds here and there to account for the changes in the planet's rotation.   What does th…
Follow this checklist to learn more about the 15 things you should never include in an email signature from personal quotes, animated gifs and out-of-date marketing content.
Get people started with the process of using Access VBA to control Outlook using automation, Microsoft Access can control other applications. An example is the ability to programmatically talk to Microsoft Outlook. Using automation, an Access applic…
This Experts Exchange video Micro Tutorial shows how to tell Microsoft Office that a word is NOT spelled correctly. Microsoft Office has a built-in, main dictionary that is shared by Office apps, including Excel, Outlook, PowerPoint, and Word. When …

930 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

12 Experts available now in Live!

Get 1:1 Help Now