On Tue, Jun 17, 2025 at 07:13:49PM +0200, lejeczek via Postfix-users wrote:
> Could it be something that postfix uses, something calls out, a third-party?
> There is nothing 'explicit' in my master.cf nor in main.cf which mentions
> 'fifo/file'.
Can you post your master.cf file, or more precisely, the output of:
$ postconf -Mf
with whitespace and line breaks unmodified?
The change that Wietse alluded to is:
--- a/conf/master.cf
+++ b/conf/master.cf
@@ -34,10 +34,10 @@ smtp inet n - n - -
smtpd
# -o smtpd_recipient_restrictions=permit_sasl_authenticated,reject
# -o milter_macro_daemon_name=ORIGINATING
#628 inet n - n - - qmqpd
-pickup fifo n - n 60 1 pickup
+pickup unix n - n 60 1 pickup
cleanup unix n - n - 0 cleanup
-qmgr fifo n - n 300 1 qmgr
-#qmgr fifo n - n 300 1 oqmgr
+qmgr unix n - n 300 1 qmgr
+#qmgr unix n - n 300 1 oqmgr
tlsmgr unix - - n 1000? 1 tlsmgr
rewrite unix - - n - - trivial-rewrite
bounce unix - - n - 0 bounce
Which changed the service type of "pickup" from "fifo" to "unix". The
"qmgr" changes should not matter, since "postdrop" does not directly
interact with the queue manager. After writing the queue file, it
does attempt to wake up the pickup(8) service.
You should also post verbatim "postconf -nf" output, in case there's
anything odd there.
> My postfix also uses amavisd & pyspf-milter.
> many thanks, L.
Neither dovecot, milter, nor amavis settings are relevant to the
"postdrop" helper. Its job is rather minimal, write a queue file and
send a wakeup message to pickup(8).
--
Viktor.
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