diff --git a/run b/run
index a6d0c6b..53878c7 100755
--- a/run
+++ b/run
@@ -2,7 +2,9 @@
 QMAILDUID=`id -u smtpd`
 NOFILESGID=`id -g smtpd`
 LANG=C
-exec /usr/local/bin/softlimit -m 75000000 \
+# by default limit qpsmtpd to 150MB memory which should be several
+# times what is needed.
+exec /usr/local/bin/softlimit -m 150000000 \
   /usr/local/bin/tcpserver -c 10 -v -R -p \
   -u $QMAILDUID -g $NOFILESGID `head -1 config/IP` smtp \
   ./qpsmtpd 2>&1