I am doing an assignment for an Information Security Management module at university and I am currently doing a comparison between signed and unsigned, encrypted and unencrypted emails etc.
I was hoping to do a Wireshark analysis of an email (gmail account) being sent over an unsecured channel so I could demonstrate how an attacker could intercept the message and then compare it with an email being sent over TLS.
I am using Thunderbird as the email client and I am wondering how I can send emails over unsecured SMTP? I tried changing the port number to 25 in Thunderbird but it doesn't seem to be able to send it.
So, is it possible to use unsecured channels with Gmail? If so, how?
Thanks