Unable to send mail with attachments

Hello,

As of this morning (10/8/2010), I've been unable to send e-mail with attachments. I've confirmed the problem with a couple of our other employees.

Everything appears to work fine at first.... we're able to select the file to attach and it shows as being attached; however, once sent, there is no attachment.

We've tried with a several different file sizes and types with no success.

Please advise.

Thank you,
Howard