Sunday, May 16, 2004

SMTP with t-mobile

Today I had to wait while I had a tire repaired, so I decided to wait at a Starbucks. I firgured that I would bring my laptop and use it to get some stuff done with the t-mobile 802.11b,

When I tried to send an email, my mail client stated that the mail server did not use authentication (The mail server that I use requires authentication). After a little digging, it looks like t-mobile intercepts all outgoing connections to port 25, and then sends it to their smtp server.

That seems like it could be a possible security concern. If I sent a message using the smtp server in my mail client (in general a isp or company’s server), and it actually goes to a different server, I don’t like that. I think that it would be better if they just blocked outgoing connections to port 25. Then the user should have to explicitly set up their smtp server in order to send outgoing messages.

I didn’t read the terms of service that closely, but this might be listed there.

Today, what I did was to tunnel the smpt connection through my ssh connection to the mail server. With doing that, I could guarantee the privacy of my email.