Increase ip anonymization for mail logging
Working on https://github.com/pixelated/pixelated-platform/issues/157 is found that the reverse lookup done by postfix still reveals the IP:
Jan 27 10:52:53 cat postfix/smtpd[15485]: warning: hostname 199-119-112-207.i95.net does not resolve to address 0.0.0.0: Name or service not known Jan 27 10:52:53 cat postfix/smtpd[15485]: connect from unknown[0.0.0.0] Jan 27 10:52:53 cat postfix/smtpd[15485]: NOQUEUE: reject: RCPT from unknown[0.0.0.0]: 554 5.7.1 : Relay access denied; from= to= proto=ESMTP helo= Jan 27 10:52:53 cat postfix/smtpd[15485]: disconnect from unknown[0.0.0.0]
(from redmine: created on 2016-01-28)