I installed Postfix with Postfixadmin some weeks ago. I've been able to solve most of issues I met (several errors from receiving servers) but there is something I cannot understand yet.
This is what I get from a receiving SMTP server:
Jun 23 09:57:43 node1 postfix/smtp: send attr reason = host
mail.domain.it[abc.abc.abc.abc] refused to talk to me: 550
Jun 23 09:57:43 node1 postfix/smtp: 418E098004C2:
25, delay=80211, delays=80211/0.03/0.45/0, dsn=4.0.0, status=deferred
(host mail.domain.it[abc.abc.abc.abc] refused to talk to me: 550 )
I also tried:
# telnet mail.domain.it 25
Connected to mail.domain.it (abc.abc.abc.abc).
Escape character is '^]'.
Connection closed by foreign host.
What's that? A sort of blacklist?
I checked my IP at http://mxtoolbox.com/blacklists.aspx
but it seems it's not blacklisted at all... :-(