diff --git a/management/status_checks.py b/management/status_checks.py
index 3459d358..92d5c887 100755
--- a/management/status_checks.py
+++ b/management/status_checks.py
@@ -259,6 +259,7 @@ def check_free_memory(rounded_values, env, output):
 		if rounded_values: memory_msg = "System free memory is below 10%."
 		output.print_error(memory_msg)
 
+import subprocess
 def run_network_checks(env, output):
 	# Also see setup/network-checks.sh.
 
@@ -269,8 +270,8 @@ def run_network_checks(env, output):
 	# Stop if we cannot make an outbound connection on port 25. Many residential
 	# networks block outbound port 25 to prevent their network from sending spam.
 	# See if we can reach one of Google's MTAs with a 5-second timeout.
-	_code, ret = shell("check_call", ["/bin/nc", "-z", "-w5", "aspmx.l.google.com", "25"], trap=True)
-	if ret == 0:
+	ret = subprocess.run("/usr/bin/nc -z -w5 aspmx.l.google.com 25", shell=True, capture_output=True)
+	if ret.returncode == 0:
 		output.print_ok("Outbound mail (SMTP port 25) is not blocked.")
 	else:
 		output.print_error("""Outbound mail (SMTP port 25) seems to be blocked by your network. You