What does match_list_match mean?

[chrishammond]

I am having a problem with a spam server I built and installed for a customer. Everything seems to be fine but one of their customers was unable to email them. The only trace I saw was the connection attempt, lost connection and then disconnect. I did some digging and found nothing that meant anything to me so I added -v to the master.cf for the smtpd line and I found the match_list_match: domain/ip no match. I grepped the log and found a ton of them. I searched via google and things seemed to keep pointing at authentication related issues. But I am not using any authentication. Here is a sample of what I am seeing. Can someone please point me in the right direction as I am lost at this point. I am getting the no match error from other sites also and need to figure out what I have done wrong.

Thanks
Chris

Dec 21 10:10:19 antispam postfix/smtpd[16035]: connect from eisner.encompasserve.org[192.135.80.34]
Dec 21 10:10:19 antispam postfix/smtpd[16035]: match_list_match: eisner.encompasserve.org: no match
Dec 21 10:10:19 antispam postfix/smtpd[16035]: match_list_match: 192.135.80.34: no match
Dec 21 10:10:19 antispam postfix/smtpd[16035]: match_list_match: eisner.encompasserve.org: no match
Dec 21 10:10:19 antispam postfix/smtpd[16035]: match_list_match: 192.135.80.34: no match
Dec 21 10:10:19 antispam postfix/smtpd[16035]: > eisner.encompasserve.org[192.135.80.34]: 220 antispam.lpits.com ESMTP Postfix USE/SPAM in not welcome here.
Dec 21 10:10:19 antispam postfix/smtpd[16035]: watchdog_pat: 0x91330c0
Dec 21 10:10:19 antispam postfix/smtpd[16035]: smtp_get: EOF
Dec 21 10:10:19 antispam postfix/smtpd[16035]: lost connection after CONNECT from eisner.encompasserve.org[192.135.80.34]
Dec 21 10:10:19 antispam postfix/smtpd[16035]: disconnect from eisner.encompasserve.org[192.135.80.34]
Dec 21 10:10:19 antispam postfix/smtpd[16035]: master_notify: status 1
Dec 21 10:10:19 antispam postfix/smtpd[16035]: connection closed