Just be VERY VERY careful about this, and make sure you use a good strong password. Minimum of 8 characters long, no words found in a dictionary, mix of letters AND numbers (about half and half), and keep away from any easily discernible patterns.
The trick to this is to run your own SMTP server on your system. The reason I say to be so careful, is spammers absolutely love to find what are called open relays, or SMTP servers without any kind of password or restriction on their use. Anyway, this allows you to keep the same settings, and send emails from anywhere you have an Internet connection.
You should also really rethink using Outlook. Not only does it have some security issues, but it's easily exploited for use by spammers. Using some simple little tricks, they can verify that your email address is active, making sure that you get plenty more spam in the future. That, and as of Outlook 2003, it's spam tools are an absolute joke. Hardly worth bothering with, not that it stops Microsoft from listing them as this huge selling point in the promotional literature, but I digress. Point is, there are many better email programs out there, and it would be rather behooving of you to find one to replace Outlook. Oh, and Outlook Express is not one of them.
I'm an Outlook e-mail client user and since I'm often traveling from place to place with free internet access I need to send and receive mail. Receiving is no problem since my pop client settings don't need to change from access point to access point. However I can not send using my SMTP server since most users don't have access to that kind of information. Is there a way I can send mail using my e-mail account through different smtp servers universally? Thank you in advance.