I am using Microsoft Outlook 2007 and emailing an excel spreadsheet and a one page pdf file.  Anyone who uses Windows Mail or Windows Live Mail is unable to receive the attachment. 

I have checked with my email service provider and their system shows that the email goes through their firewall and virus software and is delivered with the attachment, but the recipient does not get the attachment.  they can't even see the attachments at all.

Since I use Windows Mail at home I tested this.  I unchecked the "Don't allow attachments" box and still could not receive the attachments.   All attachments are either .xlsx, .xls or .pdf files.  Two weeks ago I could get the attachments at my home email and had no problem accessing them.   As of last week I have had probably 25 people who use Windows live or Windows mail tell me there is nothing attached to my email.

What happened?  and how do we fix?   Again, the box is unchecked to allow all attachments to come through and this is not working.

Kim