Spontaneous "queue file write error"s Dear Postfix Users,


 From now and then our postfix server generates error emails with error 
messages like the following:

Out: 451 4.3.0 Error: queue file write error
or
Out: 451 4.3.0 : Temporary lookup failure


We use MySQL for lookup tables. Additionally we are using a pre-queue 
content-filter:

smtp      inet  n       -       -       -       100       smtpd -o 
content_filter=filter:dummy

We set the option smtpd_proxy_timeout to 1000s, but the "queue file 
write error" still keeps occurring.


Any ideas, what could cause the "queue file write error"? The logs don't 
show anything.


Best,


Eddy


