no file extensions for attachments?

I'm not sure if I'm having the same issue as you, but when I send attachments through Mail, the recipients tell me that the file name has been truncated. This is especially frustrating when the file name includes important information like date, time, etc. in the file name to help identify what version of the file it is. How do I fix this issue?

I, like you, have also made sure to check the box for "Windows friendly" attachments, but that still hasn't seemed to fix the issue. This issue also just popped up one day out of the blue. I used to be able to send attachments without the file name being truncated.

Any suggestions?

I too am having the same problem. Has anyone found a solution to this issue?

I have the same issue, but I'm on the receiving end. I open emails from a friend in Gmail and the attachment is always truncated. However, if I download the email using Thunderbird, the attachment has the full name and I'm able to open it.

Have you tried sending the Mails w/attachments as Text Only? Not HTML?

I've had this problem for months. Any word from Apple whether it is an Apple Mail issue? I'd hate to use Thunderbird or (gulp) MS Entourage.

The issue happens when I send an attachment to a web email address (like gmail, hotmail). Works fine if I send to an Exchange-server email address (like to my work email).

Even more weird - when I view the attachment from my gmail/hotmail through a client (in this case Apple Mail), it is fine. The name and extension is only truncated when I read through the web interface.

What gives?

Update: This seems to be happening when I am sending an attachment with a filename with spaces in it.

Is this what others are experiencing?

Does Mac OS X support spaces in filenames?

OSX does, but it is a problem in Mail I hear.

For an initial work around this problem you can advise the person receiving the attachment to save the file to their hard drive and include the extension. They should then be able to successfully open the file. Sometimes I receive files that don't have an extension and that usually works to be able to open a file.

Windows users sometimes receive two file attachments, one is a .dat file which is very small and can be disregarded.

It is best when sending to Windows users to have file names that are short and without spaces.