I have one client who hosts with us on my VPS... For some reason when he sends an email, the email is sent but it doesn't get removed from his Outbox into his Sent Items. It just stays in the Outbox. So the email sends over and over and over.
I think it might have something to do with maybe his firewall or anitvirus software. He uses trendmicro.
The annoying thing is it happens to all their computer sin the office. He's still yet to confirm this but he doesn't think trendmicro is installed on all the computers that are having the issue.
Any ideas what the issue could be?