diff --git a/DOC/install/.postfix_mailsystem.install.swp b/DOC/install/.postfix_mailsystem.install.swp
new file mode 100644
index 0000000..80c49e8
Binary files /dev/null and b/DOC/install/.postfix_mailsystem.install.swp differ
diff --git a/install_postfix_relay.sh b/install_postfix_relay.sh
index 838ef34..794acfa 100755
--- a/install_postfix_relay.sh
+++ b/install_postfix_relay.sh
@@ -477,6 +477,11 @@ cat <<EOF >> /etc/postfix/main.cf
 ## -
 mailbox_size_limit = 0
 
+## - The maximal size in bytes of an individual virtual(8) mailbox or
+## - maildir file, or zero (no limit).
+## -
+virtual_mailbox_limit = 0
+
 ## - The maximal size in bytes of a message, including envelope information.
 ## -
 ## - we user 50MB