diff --git a/src/freedombone b/src/freedombone
index b97fd216..06095181 100755
--- a/src/freedombone
+++ b/src/freedombone
@@ -1239,11 +1239,110 @@ function test_domain_name {
 
 # check that domain names are sensible
 function check_domains {
-  test_domain_name $WIKI_DOMAIN_NAME
-  test_domain_name $OWNCLOUD_DOMAIN_NAME
-  test_domain_name $FULLBLOG_DOMAIN_NAME
-  test_domain_name $MICROBLOG_DOMAIN_NAME
-  test_domain_name $REDMATRIX_DOMAIN_NAME
+  if [ $WIKI_DOMAIN_NAME ]; then
+      test_domain_name "$WIKI_DOMAIN_NAME"
+
+      if [[ "$WIKI_DOMAIN_NAME" == "$OWNCLOUD_DOMAIN_NAME" ]]; then
+          echo 'Wiki domain name is the same as Owncloud domain name. They must be different'
+          exit 73863
+      fi
+      if [[ "$WIKI_DOMAIN_NAME" == "$FULLBLOG_DOMAIN_NAME" ]]; then
+          echo 'Wiki domain name is the same as blog domain name. They must be different'
+          exit 97326
+      fi
+      if [[ "$WIKI_DOMAIN_NAME" == "$MICROBLOG_DOMAIN_NAME" ]]; then
+          echo 'Wiki domain name is the same as microblog domain name. They must be different'
+          exit 36827
+      fi
+      if [[ "$WIKI_DOMAIN_NAME" == "$REDMATRIX_DOMAIN_NAME" ]]; then
+          echo 'Wiki domain name is the same as redmatrix domain name. They must be different'
+          exit 93637
+      fi
+  fi
+
+  if [ $OWNCLOUD_DOMAIN_NAME ]; then
+      test_domain_name "$OWNCLOUD_DOMAIN_NAME"
+
+      if [[ "$OWNCLOUD_DOMAIN_NAME" == "$WIKI_DOMAIN_NAME" ]]; then
+          echo 'Owncloud domain name is the same as wiki domain name. They must be different'
+          exit 37994
+      fi
+      if [[ "$OWNCLOUD_DOMAIN_NAME" == "$FULLBLOG_DOMAIN_NAME" ]]; then
+          echo 'Owncloud domain name is the same as blog domain name. They must be different'
+          exit 37936
+      fi
+      if [[ "$OWNCLOUD_DOMAIN_NAME" == "$MICROBLOG_DOMAIN_NAME" ]]; then
+          echo 'Owncloud domain name is the same as microblog domain name. They must be different'
+          exit 36896
+      fi
+      if [[ "$OWNCLOUD_DOMAIN_NAME" == "$REDMATRIX_DOMAIN_NAME" ]]; then
+          echo 'Owncloud domain name is the same as redmatrix domain name. They must be different'
+          exit 79362
+      fi
+  fi
+
+  if [ $FULLBLOG_DOMAIN_NAME ]; then
+      test_domain_name "$FULLBLOG_DOMAIN_NAME"
+
+      if [[ "$FULLBLOG_DOMAIN_NAME" == "$WIKI_DOMAIN_NAME" ]]; then
+          echo 'Blog domain name is the same as wiki domain name. They must be different'
+          exit 62348
+      fi
+      if [[ "$FULLBLOG_DOMAIN_NAME" == "$OWNCLOUD_DOMAIN_NAME" ]]; then
+          echo 'Blog domain name is the same as Owncloud domain name. They must be different'
+          exit 84682
+      fi
+      if [[ "$FULLBLOG_DOMAIN_NAME" == "$MICROBLOG_DOMAIN_NAME" ]]; then
+          echo 'Blog domain name is the same as microblog domain name. They must be different'
+          exit 38236
+      fi
+      if [[ "$FULLBLOG_DOMAIN_NAME" == "$REDMATRIX_DOMAIN_NAME" ]]; then
+          echo 'Blog domain name is the same as redmatrix domain name. They must be different'
+          exit 36813
+      fi
+  fi
+
+  if [ $MICROBLOG_DOMAIN_NAME ]; then
+      test_domain_name "$MICROBLOG_DOMAIN_NAME"
+
+      if [[ "$MICROBLOG_DOMAIN_NAME" == "$WIKI_DOMAIN_NAME" ]]; then
+          echo 'Microblog domain name is the same as wiki domain name. They must be different'
+          exit 73924
+      fi
+      if [[ "$MICROBLOG_DOMAIN_NAME" == "$OWNCLOUD_DOMAIN_NAME" ]]; then
+          echo 'Microblog domain name is the same as Owncloud domain name. They must be different'
+          exit 73683
+      fi
+      if [[ "$MICROBLOG_DOMAIN_NAME" == "$FULLBLOG_DOMAIN_NAME" ]]; then
+          echo 'Microblog domain name is the same as blog domain name. They must be different'
+          exit 26832
+      fi
+      if [[ "$MICROBLOG_DOMAIN_NAME" == "$REDMATRIX_DOMAIN_NAME" ]]; then
+          echo 'Microblog domain name is the same as redmatrix domain name. They must be different'
+          exit 36373
+      fi
+  fi
+
+  if [ $REDMATRIX_DOMAIN_NAME ]; then
+      test_domain_name "$REDMATRIX_DOMAIN_NAME"
+
+      if [[ "$REDMATRIX_DOMAIN_NAME" == "$WIKI_DOMAIN_NAME" ]]; then
+          echo 'RedMatrix domain name is the same as wiki domain name. They must be different'
+          exit 83682
+      fi
+      if [[ "$REDMATRIX_DOMAIN_NAME" == "$OWNCLOUD_DOMAIN_NAME" ]]; then
+          echo 'RedMatrix domain name is the same as Owncloud domain name. They must be different'
+          exit 65192
+      fi
+      if [[ "$REDMATRIX_DOMAIN_NAME" == "$FULLBLOG_DOMAIN_NAME" ]]; then
+          echo 'RedMatrix domain name is the same as blog domain name. They must be different'
+          exit 74817
+      fi
+      if [[ "$REDMATRIX_DOMAIN_NAME" == "$MICROBLOG_DOMAIN_NAME" ]]; then
+          echo 'RedMatrix domain name is the same as microblog domain name. They must be different'
+          exit 83683
+      fi
+  fi
 }
 
 # Checks whether certificates were generated for the given hostname