For the life of me, I can't get the device to work properly with email. If i don't have DNS settings entered, I can click on the test email button and a message pops up saying an email was sent. No email arrives. If I have DNS settings entered and click on the test email button, I get no popup message and don't get any emails.
For what it is worth, I am getting similar results.
I even tried opening up port 25 (the send mail port) on the IP address on my firewall. All with similar results .... email message pops up, but no message comes through ... AND no information in the log
The "Auth Type" setting doesn't seem to make a difference either ...
Have you had any luck with this since you last posted?
Some email account providers doesn't allow usage of smtp protocol if the sender (your nas) have an unreachable source adress ip into the ip sending frame (like commonly your nas is 192.168.X.X which is not available from the wan).
For example, if your nas is behind your router, the smtp.mail.yahoo.com provider doesn't work but the smtp.mail.yahoo.fr do, because it doesn't check the sender ip.