On 10/28/2015 03:14 PM, Ted Lemon wrote: > On Oct 28, 2015, at 3:27 PM, Viktor Dukhovni <ietf-dane@xxxxxxxxxxxx > .... > In order for this to work, when I connect to my maildrop, my maildrop > has to immediately connect to ietf.org <http://ietf.org> when it sees > RCPT TO: ietf@xxxxxxxx <mailto:ietf@xxxxxxxx>. .... Which can no happen in some sites with firewalls or ISPs. The ISP I use at home decided to block all access in or out to port 25. Did not tell me. I had to figure it out. That's how they decided to slow down outgoing spam. I changed my outgoing system configuration. And some sites use an smtp proxy to send out email. You will not have a clue if they queue before sending. No direct connection allowed and they do not tell you. Some sites translate internal email addresses to/from internal ones as they traverse the firewall. This happened at Sun, Inside Sun I was dougr@xxxxxxxxxxxxxxxxx, to the outside world I was Doug.Royer@xxxxxxx. Whatever the solution it has to be some kind of identity proof without regard to routing. -- Doug Royer - (http://K7DMR.us / http://DougRoyer.US) DouglasRoyer@xxxxxxxxx 714-989-6135
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