diff --git a/do-backup b/do-backup
index 171cec0..6e8de5a 100755
--- a/do-backup
+++ b/do-backup
@@ -81,10 +81,16 @@ source /etc/mail.conf "backups" 2>/dev/null || {
 # Make sure BACKUP_MOUNTPOINT is a mountpoint.
 mountpoint "$BACKUP_MOUNTPOINT" >/dev/null 2>&1 || {
   [[ -x "/opt/bin/pushover" ]] && CONFIG_FILE="backups" /opt/bin/pushover -T "Backup" -p '-1' -m "Failure: $RSYNC_SOURCE"
-  [[ -n "${EMAIL_TO[*]}" ]] && mailx "${MAILX_ARGS[@]}" -S "from='$EMAIL_FROM'" -s "Backup failure: $RSYNC_SOURCE" "${EMAIL_TO[@]}" <<-EOF
-	'$BACKUP_MOUNTPOINT' is not a mountpoint.
-	EOF
-  exit 1
+  if [[ -n "${EMAIL_TO[*]}" ]]; then
+    mailx "${MAILX_ARGS[@]}" -S "from='$EMAIL_FROM'" -s "Backup failure: $RSYNC_SOURCE" "${EMAIL_TO[@]}" <<-EOF 2>/dev/null || \
+        printf "%s: %s\\n" "${0##*/}" "mailx command failed" >&2
+		'$BACKUP_MOUNTPOINT' is not a mountpoint.
+		EOF
+    exit 1
+  else
+    printf "%s: %s\\n" "${0##*/}" "no recipient configured for mail delivery" >&2
+    exit 1
+  fi
 }
 
 # Do the backup.
@@ -94,15 +100,20 @@ ERR="$?"
 # Send a notification and mail a log if there were errors.
 (( ERR != 0 )) && (( ERR != 10 ))  && (( ERR != 24 )) && {
   [[ -x "/opt/bin/pushover" ]] && CONFIG_FILE="backups" /opt/bin/pushover -T "Backup" -p '-1' -m "Failure: $RSYNC_SOURCE"
-  [[ -n "${EMAIL_TO[*]}" ]] && mailx "${MAILX_ARGS[@]}" -S "from='$EMAIL_FROM'" -s "Backup failure: $RSYNC_SOURCE" "${EMAIL_TO[@]}" <<-EOF
-	Exit code: $ERR
-	Output:
-	$(< "$RSYNC_LOG")
-	EOF
-  rm -f "$RSYNC_LOG"
-  exit 1
+  if [[ -n "${EMAIL_TO[*]}" ]]; then
+    mailx "${MAILX_ARGS[@]}" -S "from='$EMAIL_FROM'" -s "Backup failure: $RSYNC_SOURCE" "${EMAIL_TO[@]}" <<-EOF 2>/dev/null || \
+        printf "%s: %s\\n" "${0##*/}" "mailx command failed" >&2
+		Exit code: $ERR
+		Output:
+		$(< "$RSYNC_LOG")
+		EOF
+    RET=1
+  else
+    printf "%s: %s\\n" "${0##*/}" "no recipient configured for mail delivery" >&2
+    RET=1
+  fi
 }
 
 rm -f "$RSYNC_LOG"
 
-exit 0
+exit "${RET:-0}"