@beasts@social.mythic-beasts.com @pluralistic@mamot.fr
they seems to have do some change of config recently.
some client on MS have tell us that dkim was broken. It was not but they have raised the bar to 2048bits rsa key for dkim (may be we were lagging behind on that).
we have configured postfix to "talk" slowly to their smtp server, but we have been temporary banned for sending to much mails to them...

such pain, if only they were'nt 1/4 of our mails destinations...
#smtp