Today I found this in my log: Jan 12 22:39:39 mail postfix/postscreen[17030]: COMMAND PIPELINING from [216.46.18.51]:58366 after QUIT
So I wondered -- "after QUIT?" and had a look at the client: mail:~# host 216.46.18.51 51.18.46.216.in-addr.arpa is an alias for 51.32/27.18.46.216.in-addr.arpa. 51.32/27.18.46.216.in-addr.arpa domain name pointer mail51.parafat.org. mail:~# telnet mail51.parafat.org. 25 Trying 216.46.27.98... Connected to parafat.org. Escape character is '^]'. 220 mail98.parafat.org ESMTP Postfix (Ubuntu) QUIT 221 2.0.0 Bye Connection closed by foreign host. Would a Postfix instance trigger postscreen of another instance? -- Ralf Hildebrandt Geschäftsbereich IT | Abteilung Netzwerk Charité - Universitätsmedizin Berlin Campus Benjamin Franklin Hindenburgdamm 30 | D-12203 Berlin Tel. +49 30 450 570 155 | Fax: +49 30 450 570 962 ralf.hildebra...@charite.de | http://www.charite.de