diff --git a/install_postfix_base.sh b/install_postfix_base.sh
index 40b0b0a..1334e2b 100755
--- a/install_postfix_base.sh
+++ b/install_postfix_base.sh
@@ -688,9 +688,21 @@ alias_database =
 ## -
 ## - Note: \$sender_canonical_maps is processed before \$canonical_maps.
 ## -
-sender_canonical_maps = btree:/etc/postfix/sender_canonical
+sender_canonical_maps = 
+   btree:/etc/postfix/sender_canonical
 
 
+## - smtp_generic_maps (default: empty)
+## -
+## - Optional lookup tables that perform address rewriting in the Postfix 
+## - SMTP client, typically to transform a locally valid address into a 
+## - globally valid address when sending mail across the Internet. This is 
+## - needed when the local machine does not have its own Internet domain name, 
+## -but uses something like localdomain.local instead. 
+## -
+smtp_generic_maps =
+   btree:/etc/postfix/generic
+
 ## - The maximal time a message is queued before it is sent back as 
 ## - undeliverable. Defaults to 5d (5 days)
 ## - Specify 0 when mail delivery should be tried only once.
@@ -1218,6 +1230,19 @@ else
    echo_failed
 fi
 
+echononl "   Create file \"generic\""
+if [[ ! -f /etc/postfix/generic ]]; then
+   cat <<EOF > /etc/postfix/generic
+@localhost  @$(hostname -f)
+EOF
+fi
+postmap btree:/etc/postfix/generic
+if [[ $? -eq 0 ]] ; then
+   echo_ok
+else
+   echo_failed
+fi
+
 
 ## - restart postfix
 ## -