damaged PDF file when mass-mailing

[wvuuc]

In Membership>Personal Profiles>Email to Selected Profiles
Selected parameters for profile selection, created email, attached a PDF file (monthly newsletter), sent email.
Opened the PDF file on my computer prior to attaching it to the email.
In my own email, my copy of the mailing appeared. When I said to open the PDF file, Adobe Acrobat 6.0 gave me the message "There was an error opening this document. The file is damaged and could not be repaired."
This has happened multiple times with multiple pdf files created by at least 2 different people.
Anyone have any clues about how to fix this?
Wayne. Glendale, Arizona

[NeilZ]

In Membership>Personal Profiles>Email to Selected Profiles
Selected parameters for profile selection, created email, attached a PDF file (monthly newsletter), sent email.
Opened the PDF file on my computer prior to attaching it to the email.
In my own email, my copy of the mailing appeared. When I said to open the PDF file, Adobe Acrobat 6.0 gave me the message "There was an error opening this document. The file is damaged and could not be repaired."
This has happened multiple times with multiple pdf files created by at least 2 different people.
Anyone have any clues about how to fix this?
Wayne. Glendale, Arizona

How large are the files and do you have an antivirus scanning all outgoing email ??

[wvuuc]

The file is 373KB
I am not scanning outbound emails.