Winmail.dat attachments

Are you getting winmail.dat attachments in your email?

The quick reason why you are getting those attachments is because the person sending you the attachment is using Microsoft Outlook as their email client. The sender can still use Outlook but will need to make a couple of modifications on their side before sending you an attachment.

First they will need to make sure that their message is formatted in Plain Text or HTML. In a new message window, they will need to click on Options tab and then select Plain Text or HTML from the Format section.

Next they will need to make sure that they enter in your full email address in the To or CC field (ex: instead of just your username and letting it auto-correct from the Global Address List.

Doing these steps should correct the problem you are seeing. As always, please contact the Helpesk if you need assistance in this matter.

For more information check out these Microsoft Knowledge Base Articles:

Bounced Email Issues

Are you receiving bounced messages when trying to send email that look similar to this?

Delivery has failed to these recipients or distribution lists:

The recipient’s e-mail address was not found in the recipient’s e-mail system. Microsoft Exchange will not try to redeliver this message for you. Please check the e-mail address and try resending this message, or provide the following diagnostic text to your system administrator.

Here is what you will need to do:
1. Close Microsoft Outlook.
2. Open Window Explorer (Right-click on Start, select Explore OR hit the Windows + E keys)
3. Navigate to the Outlook folder in your profile: C:\WINNT\profiles\your_username\Application Data\Microsoft\Outlook
4. Delete the .nk2 file that is listed there.
5. Contact the Helpdesk at x4-1950 if you need assistance or have trouble with this process.

CLARIFICATION: This will remove ALL cached email addresses that you have stored in Outlook. If there are addresses that are not currently in your Address Book or Contacts you will need to save those before following the directions above.

Email Tip

How do you tell if a message is hoax or fraudulent?

  • Do a quick web search or check out sites such as Snopes. Snopes lists a lot of emails that are commonly passed around and will list why it is false and sometimes the origin or the small truth that started it all.
  • The email asks you to forward it to all of your friends or a certain number of people in a certain amount of time.
  • There are a lot of misspellings or punctuation where there should be none (L I K E.This).
  • Typos in URLs easily overlooked (like
  • It is from a company or bank that you don’t do business with.
  • It is asking you to verify bank account numbers or passwords.
  • If it sounds too good to be true it most likely is.

These are just a few tips, but if you have even the smallest of question on an email, delete it or contact the Helpdesk for further assistance.