Email IP address privacy in chatmail

gtxyd4x7u · November 7, 2024, 2:20pm

Hi.

Standard email solutions may expose the email address, is chatmail designed to hide the client IP address?

link2xt · November 7, 2024, 2:45pm

Yes, in chatmail SMTP server is configured to remove Recevied: header with client IP address from outgoing mails:

deltachat/chatmail/blob/12217437e32af01f81eee6461f682252dd46ce55/cmdeploy/src/cmdeploy/postfix/submission_header_cleanup

/^Received:/            IGNORE
/^X-Originating-IP:/    IGNORE
/^X-Mailer:/            IGNORE
/^User-Agent:/          IGNORE

There is also a test:

github.com

deltachat/chatmail/blob/12217437e32af01f81eee6461f682252dd46ce55/cmdeploy/src/cmdeploy/tests/online/test_2_deltachat.py#L170-L181


      
          def test_hide_senders_ip_address(cmfactory):
              public_ip = requests.get("http://icanhazip.com").content.decode().strip()
              assert ipaddress.ip_address(public_ip)
          
              user1, user2 = cmfactory.get_online_accounts(2)
              chat = cmfactory.get_accepted_chat(user1, user2)
          
              chat.send_text("testing submission header cleanup")
              user2._evtracker.wait_next_incoming_message()
              user2.direct_imap.select_folder("Inbox")
              msg = user2.direct_imap.get_all_messages()[0]
              assert public_ip not in msg.obj.as_string()