diff --git a/mptcp/files/usr/share/omr/post-tracking.d/post-tracking b/mptcp/files/usr/share/omr/post-tracking.d/post-tracking
index 33b629612..8b1bcb098 100755
--- a/mptcp/files/usr/share/omr/post-tracking.d/post-tracking
+++ b/mptcp/files/usr/share/omr/post-tracking.d/post-tracking
@@ -344,7 +344,7 @@ if [ "$OMR_TRACKER_STATUS" = "ERROR" ] || [ "$interface_up" != "true" ]; then
 	fi
 	mail_alert="$(uci -q get omr-tracker.$OMR_TRACKER_INTERFACE.mail_alert)"
 	[ -z "$mail_alert" ] && mail_alert="$(uci -q get omr-tracker.defaults.mail_alert)"
-	[ "$mail_alert" = "1" ] && {
+	[ "$mail_alert" = "1" ] && [ -n "$(uci -q get mail.default.to)" ] && {
 		OMR_SYSNAME="$(uci -q get system.@system[0].hostname)"
 		if [ "$(uci -q get omr-tracker.defaults.mail_down_subject)" != "" ] && [ "$(uci -q get omr-tracker.defaults.mail_down_message)" != "" ]; then
 			mail_subject="$(uci -q get omr-tracker.defaults.mail_down_subject)"
@@ -474,7 +474,7 @@ if [ "$OMR_TRACKER_PREV_STATUS" != "" ] && [ "$OMR_TRACKER_PREV_STATUS" != "$OMR
 	_log "$OMR_TRACKER_INTERFACE ($OMR_TRACKER_DEVICE) switched up"
 	mail_alert="$(uci -q get omr-tracker.$OMR_TRACKER_INTERFACE.mail_alert)"
 	[ -z "$mail_alert" ] && mail_alert="$(uci -q get omr-tracker.defaults.mail_alert)"
-	[ "$mail_alert" = "1" ] && {
+	[ "$mail_alert" = "1" ] && [ -n "$(uci -q get mail.default.to)" ] && {
 		OMR_SYSNAME="$(uci -q get system.@system[0].hostname)"
 		if [ "$(uci -q get omr-tracker.defaults.mail_up_subject)" != "" ] && [ "$(uci -q get omr-tracker.defaults.mail_up_message)" != "" ]; then
 			mail_subject="$(uci -q get omr-tracker.defaults.mail_up_subject)"