[pfx] IPv6 and RBL checks

Hi all, Recently I noticed this in my logfile: 0.3.9.0.0.0.0.0.0.0.0.0.0.0.0.0.0.2.0.0.4.6.8.4.0.b.8.f.7.0.6.2.bl.spamcop.net: Host or domain name not found. Name service error for name=0.3.9.0.0.0.0.0.0.0.0.0.0.0.0.0.0.2.0.0.4.6.8.4.0.b.8.f.7.0.6.2.bl.spamcop.net type=A: Host not found, try

[pfx] Use of PTR record

Running mailservice with Postfix PTR record is set to myserver.mydomain.com (1.2.3.4) Every time I receive external e-mail, my logfile shows: Apr 25 15:01:39 terra postfix/smtpd[12479]: 073416D2: client=unknown[1.2.3.4], sasl_method=LOGIN, sasl_username=me How can I configure that client=unkno