WinXP SMTP configuration for e-Card and registration.

[jxmac18]

With my gallery now successfully loaded, I'm trying to enable SMTP. Having re-installed IIS and checked the IIS config via inetmgr    e-Card and registration are both failing to send mail:
     

The registration confirmation email can't be send !

Modifed include\mailer.inc and set:
smtp_host - my computer name (from inetmgr)
smtp_username - my computer login (which I've granted security to in inetmgr)
smtp_password - my winxp password?

Now get back these errors:
     

Ran into problems sending Mail. Response: 504 5.7.4 Unrecognized authentication type

If I change the IIS SMTP authentication to include 'Basic Authentication' and 'Integrated Windows Authentication', I get this error from e-Card and registration:
     

Ran into problems sending Mail. Response: 535 5.7.3 Authentication unsuccessful

The logging information from IIS is unhelpful, and I've checked around but nothing obvious - is mailer.inc this right place to configure this?  :?

Many thanks
Jack

[jxmac18]

:idea: I think this should actually be my ISPs SMTP server. I've configured the smtp_host to point to them, and now at least the mail is disappearing somewhere.

I'll be able to test this properly when the ISP posts me back my forgotten dial-up password.... at the moment the mails are disappearing without my username/password.