Hi there,

my zimbra installation (zcs-4.5.9_GA_1454.UBUNTU6) stopped delivering mail, and i have /var/log/mail.log full of such messages:
Dec 10 23:24:42 someserver postfix/smtp[9820]: 20F6B185530C: to=<someuser@domain.sk>, relay=127.0.0.1[127.0.0.1], delay=8628, status=sent (250 2.5.0 Ok, id=09651-02-3, DISCARD(bounce.suppressed)),
Dec 10 23:24:42 5-MeO-DMT postfix/qmgr[5841]: 20F6B185530C: removed

it looks like all the received mail is lost, so i blocked incomming connections to port 25 from world.

i tried to send mail using port 10025, and it passed! (nc localhost 10025)
but when i try to send it using port 25 mail is lost and i get such message (as mentioned above) in log

can you please help me find out what is wrong and why is all mail discarted?