I'm having some problems with only notification and Registration E-mails, it works fine if I do an Email Users from within the ACP, it goes out without issue. I'm using a google apps account, it's set up for smtp.gmail.com 587 and TLS for the settings. I know the account works as I'm using the same set up in my mail client and it works fine. Any ideas what could be causing this? What more debug information do you need to give me a hand with this.