I'm submitting 5000 messages in rapid succession using a Java application which uses the javax.mail API.
The messages are small.... less than 1kb.
I can send and receive low volumes no problem.
Not sure what the temp directory is.... where do I find this in the config? I'm running with the install defaults btw and running the latest version 4.62.
Anti-virus.... good thought! Yes, I do have real-time scanning going on. I've excluded the mercury directory and will test again tomorrow.