I have installed a new SBS 2003 sever (exchange 2003).
The server are sending E-mail thru the ISP SMTP relay server.
We have run into a strange problem. Only some of the .PDF attached files are not delivered to the intended location, others are. The mail does reach the recipient without the attachment.
It is very unlikely that it is blocked by a spam filter on the recipients side as it is doing the same on different domains even if the PDF is zipped.
If anyone have any ideas on what to try.
please let me know.