facing problem with smtp connection according to dns test:
"I was unable to connect to the SMTP port on ***.***.**.**..."
in my /var/log/mail.log:
"sm-mta: r4IG03hk015365: localhost [127.0.0.1] did not issue MAIL/EXPN/VRFY/ETRN during connection to MTA-v4
May 18 12:00:19 vps-***-*** postfix/postqueue: warning: Mail system is down -- accessing queue directly"
i'm using vps dedicate debian-6.0-x86_64.