diff --git a/bin/ngcp-credit-warning b/bin/ngcp-credit-warning
old mode 100644
new mode 100755
index 68864e4..1c38d82
--- a/bin/ngcp-credit-warning
+++ b/bin/ngcp-credit-warning
@@ -5,7 +5,7 @@ use XML::Simple;
 use Sipwise::DB;
 
 my $CONF = '/etc/ngcp-ossbss/provisioning.conf';
-my $MAIL = '/usr/bin/mail -t';
+my $MAIL = '/usr/sbin/sendmail -oi -t';
 
 sub main;