User is on Lotus6.5. When he receives a word document as an attachment from outside the company it comes through with a .dat format hence he cannot read it. Yet when that same person sends it to me it is fine...Any suggestions appreciated.
When you say "that same person", are you referring to the user getting the attachments in the wrong format, or the outside person sending the attachments to the user ?
Typically, this kind of problem is due to MS Exchange, which MS has decided to, by default, consider that every single user in the world only uses Exchange. There is a parameter somewhere in that beast that allows the user to make it understand that other mail clients exist also, and suddenly Exchange will comply with international specifications and send attachments the way they're supposed to be sent.
In other words, there is a fair chance that it is the outside sender who is in control here. I recommend asking that person what mail client he is using.
We often get winmail.dat from exchange servers. In the end we have to ask them to send it as a plain text e-mail. then the attachment is readable. M$ should not assume we all use thier product.
Hi
Thanks for the response. They are using MS OUTLOOK, but what I find strange is that I can receive the attachment fine,as a word document, Yet when they send it to this other user he receives it as .dat extension.
The reason the problem arises with this one person is because the sender on M$ LookOut will have a personal address book entry for the Notes recipient.
In the properties for this recipient the default format for mail sent to this recipient will be "Outlook Rich Text".
This assumes that the recipient is also on outlook, which is not the case. The sender needs to change this preference for the recipient.
Its a pain because I think the default setting for new personal recipients is ORT.
The problem lies with Outlook using Rich Text Fromat, which really isn't RTF, but, TNEF. To recover these files you can use a program called WMDecode. You can get the program at
It is a pretty easy program to use. Just unzip the .EXE to your desktop. To recover the files, drag the .DAT attachment to your desktop, then drag and drop it onto the WMDecode.exe icon and it will automatically recover the files and place them on your desktop.
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