diff --git a/target/scripts/startup/setup-stack.sh b/target/scripts/startup/setup-stack.sh
index 40a86cd3..07c8de75 100644
--- a/target/scripts/startup/setup-stack.sh
+++ b/target/scripts/startup/setup-stack.sh
@@ -300,7 +300,7 @@ function _setup_dovecot_local_user
   local SLEEP_PERIOD='10'
   for (( COUNTER = 11 ; COUNTER >= 0 ; COUNTER-- ))
   do
-    if [[ $(grep -cE '.+@.+\|' /tmp/docker-mailserver/postfix-accounts.cf) -ge 1 ]]
+    if [[ $(grep -cE '.+@.+\|' /tmp/docker-mailserver/postfix-accounts.cf 2>/dev/null || printf '%s' '0') -ge 1 ]]
     then
       return 0
     else