i use thunderbird (edit:portable) for my college email account, and the smtp server associated with it is blocked on most networks. when im at home, school, or my parents' house i just switch between the outgoing mail servers associated with their networks, but when im checking my email from a public computer or a computer an an unknown network, i usually cant send emails because i dont know the server. this is especially irritating when traveling. is there an easy way to find out the outgoing mail server or, alternatively, to configure it to somehow use my email account's server? my school email uses squirrelmail for web-based access, if that matters.