Try sendind such from a new Yahoo email account. Your ISP may have problems or has a policy to eject attachments.
For instance a recent news article noted a college has said "enough!" and is dumping most attachments.
Be sure your attachment and email is not overly large. Some ISP's (most) will limit your email to about 2 megabytes. Some are lowering that to 1 and less megabytes because SPAM is flooding the mail servers.
A couple of people to whom I send e-mails regularly cannot receive attachments from me.
These people receive e-mail attachments from everyone else without any problems.
I have tried sending the attachment in Plain text, Rich text and HTML formatted messages, to no avail.
The attachments blocked seem to be of any type, documents, spreadsheets, messages and contacts.
There is no indication on the other end that anything was blocked- there is just no attachment or any indication thereof (other than referenced by me in my text message, of course).
I use Outlook 2002 SP-2 and Windows XP.
At least one of the receipients use Outlook Express, I suspect the latest version.
Also, I send e-mail attachments to everyone else without any problems.
This is very frustrating, any advice that would help in troubleshooting would be appreciated.