bbs
bbs copied to clipboard
net4people
Why don't ISPs block imap pop smtp protocol traffic?
We know that no country blocks imap pop smtp, bridges can be built over it,, or encrypted traffic can be obfuscated as imap pop smtp.
ping test smtp.google.com smtp.gmail.com
imap pop smtp protocol Usage examples. https://github.com/machine1337/gmailc2
Govts and ISP's infrastructure is heavily built upon the usage of email. Doing so would really be a shot in their own legs. Delta Chat was built considering this.
As of "why haven't anyone thought so to build some kind of bridge using it?", I believe it's because of the in-suitableness of the protocol for anything other than relaying messages and emails.
There are some past systems that have used email as a circumvention channel:
- SWEET: Serving the Web by Exploiting Email Tunnels (2013)
- Leveraging Internet Services to Evade Censorship (2016) in Section 4.1 claimed to use SMTP and IMAP, though there is no source code for the CAMOUFLAGE system
- Flash proxy (2012) could use email for rendezvous: client, facilitator
