I have a bit of an issue with users being denied authentication temporarily. >From time to time users are being denied authentication for no real good reason. This is a fairly high volume site. When the users hit retry a couple times it will go through. I changed the max_connections variable of the MySQL database to match the concurrency number for vpopmail which is 400 for about 6000 users. I thought it might have been an issue of not enough sessions to serve the users but when I looked through the logs for a 400/400 I didn't find anything. Any suggestions or perhaps some architecture change suggestions would be swell. I am currently running this thing on a PIII 500Mhz w/ 256MB of ram and plenty of hard drive space on a 100Mb nic.
Thanks in advance.
