Somehow, out of the blue, my postfix setup is allowing relaying. I pass all the relay tests, but a hacker has figured out how to send email through my server without authenticating. I have checked my server for being an open relay and all the tests are passing. The only error log entry that is showing up that may be related is:
Feb 19 08:40:31 post-app3 postfix/smtpd[31907]: warning: connect #10 to subsystem private/verify: Connection refused -- Feb 19 08:40:31 post-app3 postfix/smtpd[32157]: warning: connect #8 to subsystem private/verify: Connection refused Feb 19 08:40:31 post-app3 postfix/smtpd[33028]: fatal: connect #11 to subsystem private/verify: Connection refused Feb 19 08:40:31 post-app3 postfix/pipe[31861]: warning: connect #8 to subsystem private/verify: Connection refused -- Feb 19 08:40:32 post-app3 postfix/qmgr[31126]: warning: private/dovecot socket: malformed response Feb 19 08:40:32 post-app3 postfix/qmgr[31126]: warning: transport dovecot failure -- see a previous warning/fatal/panic logfile record for the problem description Feb 19 08:40:32 post-app3 postfix/qmgr[31126]: warning: private/dovecot socket: malformed response Feb 19 08:40:32 post-app3 postfix/qmgr[31126]: warning: transport dovecot failure -- see a previous warning/fatal/panic logfile record for the problem description Feb 19 08:40:32 post-app3 postfix/qmgr[31126]: warning: private/dovecot socket: malformed response Feb 19 08:40:32 post-app3 postfix/qmgr[31126]: warning: transport dovecot failure -- see a previous warning/fatal/panic logfile record for the problem description -- Feb 19 08:40:37 post-app3 postfix/pipe[33777]: warning: connect #6 to subsystem private/verify: Connection refused Feb 19 08:40:37 post-app3 postfix/smtpd[32018]: fatal: connect #11 to subsystem private/verify: Connection refused I updated postfix and related software, the issue is still happening. Do these messages mean anything about my specific problem? -- T
