Sending Email Via Wireless

Normally, my Outlook is setup to send email via SMTP (port 25) using SSL encryption to send.columbia.edu. Oftentimes when I connect via a wireless access point, for example, at a hotel or conference, I get the error "Your server does not support the connection encryption type you specified." After troubleshooting using telnet, I found that port 25 was hijacked by the ISP's email server not to send.columbia.edu. The workaround is to use TLS and port 587, which the ISP does not hijack.