File extension automatically changes from .ppt to .dat when sending email

[Rusky]

Has anyone every heard of anything like this?

My friend has a problem that when he send an email through Microsoft Outlook, it automatically changes the extension of the file from .ppt to .dat

[Hawk001]

Was the file that was being changed an attatchment? If not then what is it?

[Zamboni]

Is he sending it to someone using Lotus Notes?

[Rusky]

From what I know it is being sent from outlook to outlook and the extension changed after it was sent.

[Zamboni]

There could still be a Lotus Domino server involved somewhere. Domino servers have a lot of problems with attachments sent from Outlook, even if the recipient is using Outlook. The other end gets either a .dat file or no attachment at all. We ended up having to use Yahoo webmail accounts to send critical attachments around the email servers.

Domino also has really bad problems with Outlook's rich text format. Try sending it again as plain text.

[Weenis]

There could still be a Lotus Domino server involved somewhere. Domino servers have a lot of problems with attachments sent from Outlook, even if the recipient is using Outlook. The other end gets either a .dat file or no attachment at all. We ended up having to use Yahoo webmail accounts to send critical attachments around the email servers.

Domino also has really bad problems with Outlook's rich text format. Try sending it again as plain text.

Yeah and unfortunately this is what the government decides to use, as well as several large government contracted buisneses. :o

[gigabyte1024]

zip it.

[nessus]

Set Outlook to send to those recipients in Plain text. Somemail systems that don't understand Mime encoding end up having emails from Exchange appear as a winmail.dat file. Doesn't matter if there is an attachment or not.

Having Outlook send to those users as plain text will resolve the issue.

http://support.microsoft.com/kb/278061/en-us

[Rusky]

Thanks for the link, it looks like that did it.

Once again they community saves the day.

[Hawk001]

Could it possibly just be a extension changes, while leaving the metadata in tact? You could just try renaming it to yourfile.ppt from yourfile.dat and see if that works.

[Rusky]

Could it possibly just be a extension change, while leaving the metadata in tact? You could just try renaming it to yourfile.ppt from yourfile.dat and see if that works.
I forgot to ask him about that, thanks for the tip.

[Hawk001]

I forgot to ask him about that, thanks for the tip.

Just let us know how it works out :D