Simon Loewenthal: > I have a postfix instance on Debian 6 that has never performed DNS > lookups with version number 2.7.1-1+squeeze1. > > The mail.log lists all connections like > > Nov 6 17:40:54 lo postfix/smtpd[10283]: 4AD4292: > client=unknown[82.2.1.3], sasl_method=PLAIN, > sasl_username=exam...@example.com > Nov 6 17:40:54 lo postfix/smtpd[10283]: disconnect from > unknown[82.2.1.3] > Real IP address obfuscated.
Debian chroot damage. http://www.postfix.org/DEBUG_README.html#no_chroot Try turning off chroot operation in master.cf A common mistake is to turn on chroot operation in the master.cf file without going through all the necessary steps to set up a chroot environment. This causes Postfix daemon processes to fail due to all kinds of missing files. The example below shows an SMTP server that is configured with chroot turned off: /etc/postfix/master.cf: # ============================================================= # service type private unpriv chroot wakeup maxproc command # (yes) (yes) (yes) (never) (100) # ============================================================= smtp inet n - n - - smtpd Inspect master.cf for any processes that have chroot operation not turned off. If you find any, save a copy of the master.cf file, and edit the entries in question. After executing the command "postfix reload", see if the problem has gone away. If turning off chrooted operation made the problem go away, then congratulations. Leaving Postfix running in this way is adequate for most sites. If you prefer chrooted operation, see the Postfix BASIC_CONFIGURATION_README file for information about how to prepare Postfix for chrooted operation.
