diff --git a/scripts/postinstall.sh b/scripts/postinstall.sh
index 88d9230b41e67fa61c1e9303b2e458e1cdcde87e..a8b1a819846e2e332d0f505e2f3ba8185f8b1936 100755
--- a/scripts/postinstall.sh
+++ b/scripts/postinstall.sh
@@ -108,7 +108,7 @@ echo -e "\n\n\n"
 echo -e "Please add the following records to your domain's DNS configuration:\n"
 find /mnt/repo-base/volumes/mail/dkim/ -maxdepth 1 -mindepth 1 -type d | while read line; do
     DOMAIN=$(basename $line)
-    echo "  - DKIM record (TXT) for $DOMAIN:" && cat $line/mail.public.key
+    echo "  - DKIM record (TXT) for $DOMAIN:" &&  sed $'N;s/"\\n\t"//g' $line/mail.public.key
 done
 
 echo "================================================================================================================================="