text_combined: eddy ilg mmujfericomnet dear postfix users postfix server generates error emails error messages like following 451 430 error queue file write error 451 430 temporary lookup failure use mysql lookup tables additionally using prequeue contentfilter smtp inet n 100 smtpd content_filterfilterdummy set option smtpd_proxy_timeout 1000s queue file write error still keeps occurring ideas could cause queue file write error logs dont show anything best eddy fri 08 aug 2008 103534 0100 spontaneous queue file write errors