>Oct 18 11:49:24 mx01 postfix/smtpd[21675]: warning: >geobyte.de.blackhole.securitysage.com: RBL lookup error: Host or domain name >not found. Name service error for name=geobyte.de.blackhole.securitysage.com >type=A: Host not found, try again
"RBL lookup error: Host or domain name not found. Name service error for ..." is the msg when the RBL goes down. This RBL error will kill performance of postfix, since every RBL query will take 80 seconds to time out, with postfix perhaps running out of smptd processs or memory. Len
