Don Hollander writes:
Is there any way to tell whether these 2.5 million installations are the EAI Ready releases? Is there a repository that counts downloads perhaps?
I used shodan.io to survey the net. Shodan is a specialised search engine. You can use it to e.g. look for netgear equipment in Italy. I used it it to look for SMTP servers that offer SMTPUTF8 and via more complicated queries, for servers that could offer it but do not. The numbers/lists I've sent Jiankang and you about deployment are based in part on Shodan queries, with some refinement/extension by custom scripts I wrote. These servers are unlikely to be completely EAI-ready. One needs about three pieces of software, maybe four. Having one is a step up from zero.
At this point, we are only looking at the suggestion of using the alias for an ASCII address when encountering a non-EAI MTA. Can either Exim or Postfix do this?
Postfix cannot. IIRC Exim cannot either, but I might have missed something. (I did read the relevant source code.) Arnt