Why don't ISPs block imap pop smtp protocol traffic?

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Why don't ISPs block imap pop smtp protocol traffic? #301

Open Pantyhose-X opened 8 months ago

Pantyhose-X commented 8 months ago

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

demarcush commented 8 months ago

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.

wkrp commented 8 months ago

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