diff --git a/target/bin/delmailuser b/target/bin/delmailuser
index c52668ce..2b98a2d4 100755
--- a/target/bin/delmailuser
+++ b/target/bin/delmailuser
@@ -101,7 +101,7 @@ do
 
   if [[ -f ${DATABASE} ]]
   then
-    if ! sedfile -i "/^${EMAIL}|/d" "${DATABASE}"
+    if ! sedfile --strict -i "/^${EMAIL}|/d" "${DATABASE}"
     then
       echo "${UNESCAPED_EMAIL} couldn't be deleted in ${DATABASE}." >&2
       ERROR=true
@@ -126,7 +126,7 @@ do
   # remove quota directives
   if [[ -f ${QUOTA_DATABASE} ]]
   then
-    if ! sedfile -i -e "/^${EMAIL}:.*$/d" "${QUOTA_DATABASE}"
+    if ! sedfile --strict -i -e "/^${EMAIL}:.*$/d" "${QUOTA_DATABASE}"
     then
       echo "Quota for ${UNESCAPED_EMAIL} couldn't be deleted in ${QUOTA_DATABASE}." >&2
     fi
diff --git a/target/bin/sedfile b/target/bin/sedfile
index 66e37274..7f8e9c6b 100755
--- a/target/bin/sedfile
+++ b/target/bin/sedfile
@@ -1,18 +1,34 @@
 #!/bin/bash
 
-# wrapper for 'sed -i': fail if file was not modified by sed
+# Wrapper for 'sed -i': fail if file was not modified by sed and container was not restarted.
+# Error output is surpressed, when container is restarted to avoid harmless error messages.
+# Use "--strict" as first parameter, to fail regardless of the container state (fresh or restarted).
+
+# When to use sedfile?
+# Is a file change optional? --> use regular 'sed -i'
+# Is a file change expected? --> use 'sedfile --strict -i'
+# Is a file change only on the first container run expected? --> use 'sedfile -i'
 
 set -ueo pipefail
 
 HASHTOOL="sha1sum"
+SKIP_ERROR=0
 
-if [[ $# -lt 1 ]]
+if [[ $# -lt 3 ]]
 then
-  echo "Error: No file given."
+  echo "Error:  At least, three parameters must be given."
+  echo "Syntax: sedfile -i <replace/delete operation> <file>"
   echo
   exit 1
 fi >&2
 
+[[ -f /CONTAINER_START ]] && SKIP_ERROR=1 # Hide error, if container was restarted.
+if [[ "${1}" == "--strict" ]]         # Show error every time.
+then
+  SKIP_ERROR=0
+  shift
+fi
+
 # get last argument
 FILE=${*: -1}
 
@@ -21,9 +37,10 @@ sed "$@"
 NEW=$(${HASHTOOL} "${FILE}")
 
 # fail if file was not modified
-if [[ ${OLD} == "${NEW}" ]]
+if [[ ${OLD} == "${NEW}" ]] && [[ ${SKIP_ERROR} -eq 0 ]]
 then
   echo "Error: sed $*"
   exit 1
 fi >&2
+
 exit 0
diff --git a/target/scripts/start-mailserver.sh b/target/scripts/start-mailserver.sh
index 0c447bfd..c85e7677 100755
--- a/target/scripts/start-mailserver.sh
+++ b/target/scripts/start-mailserver.sh
@@ -266,6 +266,9 @@ fix
 start_misc
 start_daemons
 
+# marker to check, if container was restarted
+date > /CONTAINER_START
+
 _notify 'tasklog' "${HOSTNAME} is up and running"
 
 touch /var/log/mail/mail.log
diff --git a/target/scripts/startup/fixes-stack.sh b/target/scripts/startup/fixes-stack.sh
index 54833519..3d9a58f4 100644
--- a/target/scripts/startup/fixes-stack.sh
+++ b/target/scripts/startup/fixes-stack.sh
@@ -40,11 +40,17 @@ function _fix_var_amavis_permissions
 function _fix_cleanup_clamav
 {
   _notify 'task' 'Cleaning up disabled ClamAV'
-  rm /etc/logrotate.d/clamav-* /etc/cron.d/clamav-freshclam || _notify 'err' 'Failed to remove ClamAV configuration'
+  rm /etc/logrotate.d/clamav-* /etc/cron.d/clamav-freshclam 2>/dev/null || {
+    # show error only on first container start
+    [[ ! -f /CONTAINER_START ]] && _notify 'err' 'Failed to remove ClamAV configuration'
+  }
 }
 
 function _fix_cleanup_spamassassin
 {
   _notify 'task' 'Cleaning up disabled SpamAssassin'
-  rm /etc/cron.daily/spamassassin || _notify 'err' 'Failed to remove SpamAssassin configuration'
+  rm /etc/cron.daily/spamassassin 2>/dev/null || {
+    # show error only on first container start
+    [[ ! -f /CONTAINER_START ]] && _notify 'err' 'Failed to remove SpamAssassin configuration'
+  }
 }