How to use Google Mail as a free SMTP server. Why? Well if you travel a lot and log on to different ISPs, this trick saves you having to reset your SMTP server in Outlook Express each time. Just set it and forget it and you can send email from any guest ISP, wireless or wired. Nice tip.
You can make this setup your default account, and it will always be used. You regular ISP mail will come in as per normal, and all outgoing mail will be routed through the Gmail smtp server, regardless of the connection you are on. You may wish to set the “reply-to” address to your ISP email address too.