PDF attachments sent externally via SMTP are mixed when received.
When sending externally, the attachments arrive with the content and file name switched. The attachment name has another attachment's content. For example, attachment 1 will have attachment 2 content.
Diagnosing the problem
This issue has been seen when sending from a custom database using an agent and also when sending manually using a Notes client.
Resolving the problem
This issue was reported to Quality Engineering as SPR # JALS98LNST and is fixed in Domino 9.0 Interim Fix 4.