The alert emails as well as emailing activation passwords to users has never quite worked right on our BES server. I’d see something like this in the event log every time BES tried to send an email: DoSMTPCommand: Command was: MAIL FROM: <BESAdmin> followed by DoSMTPCommand: Response was: 501 5.1.7 Invalid address. Notice the from address? There’s no domain listed. Weird. I know I entered the correct fully qualified address.

I’ve Googled, searched the docs, read forums, and everything in between and never could find the issue. I don’t have a need to email passwords to users and the alerts weren’t real important, so fixing it has been on the back burner. Fast forward to today - I came across a forum post suggesting to add a new DWORD value - MxDisabled=1 in the registry under HKEY_LOCAL_MACHINE\SOFTWARE\Research In Motion\BlackBerry Enterprise Server\BESAlert.

I tried it and low and behold it fixed the SMTP issues. I can’t imagine what disabling MX lookups would have to do with the FROM address being improperly formatted. I wonder if it’s a bug in BES? Anyone else seen this issue?