Most ISP's don't use 25 anymore because of spammers. I would double check this with your ISP.
I confirmed my ISP is using port 25 for SMTP (smtp.telus.net) for the mail server account i have with them. I was doing an experiment and basically as long that I have Login method=account, Authentication=unchecked, port=25, SMTP server=smtp.telus.net, the rest of the fields can be anything, for example username=test, password=1234, Sender email=test@bugsbunny.com and receiver email=my email address. Doing this i would still get an email, almost seems like it's the same as having it as Anonymous mode. Below is the email i got:
=================
> Date: Thu, 3 Dec 2009 20:55:02 -0700
> From: test@bugsbunny.com
> To: ngarcia1981@hotmail.com
> Subject: dlink-E24A91_E-Mail_Alert
>
> This is a test e-mail.
>
> Sincerely,
> Your DNS-323
=================
Anyways, this really isn't an issue for me, as long that i can get email alerts one way or another i'm happy.
One other thing i noticed, last night after installing the new beta build (properly followed all the instructions), because the previous firmware i had was 1.07, I installed the Bittorrent package for the first time, i decided to reset the router after doing this as well. Well my point is this morning the temperature of my dns323 was at 42C, i thought it was pretty hot due to the fact that the DNS323 is located in my basement near a window where the outside weather currently is -15C, inside probably 10-15C. So before i left for work i completely disabled the Bittorrent application, this evening when i checked the temperature again it was pretty normal at 28C. I will enable the Bittorrent application again and check the temp in the morning. Also want to add i have no files downloading/uploading with bittorrent.