diff -ruN netqmail-1.06-old/qmail-smtpd.c netqmail-1.06/qmail-smtpd.c
--- netqmail-1.06-old/qmail-smtpd.c	2022-02-25 16:29:28.449527113 +0100
+++ netqmail-1.06/qmail-smtpd.c	2022-05-22 12:06:35.739110694 +0200
@@ -63,7 +63,6 @@
 
 int spp_val;
 
-static char strnum[FMT_ULONG];
 unsigned int databytes = 0;
 unsigned int greetdelay = 0;
 unsigned int drop_pre_greet = 0;
@@ -1870,7 +1869,6 @@
 void acceptmessage(qp) unsigned long qp;
 {
   datetime_sec when;
-  strnum[fmt_uint(strnum,(unsigned int) getpid())] = 0;
   when = now();
   out("250 ok ");
   accept_buf[fmt_ulong(accept_buf,(unsigned long) when)] = 0;
@@ -1879,13 +1877,6 @@
   accept_buf[fmt_ulong(accept_buf,qp)] = 0;
   out(accept_buf);
   out("\r\n");
-  substdio_puts(&sslog, "mail recv: pid ");
-  substdio_puts(&sslog, strnum);
-  substdio_puts(&sslog, " from <");
-  substdio_puts(&sslog, mailfrom.s);
-  substdio_puts(&sslog, "> qp ");
-  substdio_puts(&sslog, accept_buf);
-  substdio_putsflush(&sslog, "\n");
 }
 
 void smtp_data(arg) char *arg; {