--- a/build/mach_bootstrap.py
+++ b/build/mach_bootstrap.py
@@ -370,18 +370,22 @@ def bootstrap(topsrcdir, mozilla_dir=Non
 
         session = requests.Session()
         for filename in os.listdir(outgoing):
             path = os.path.join(outgoing, filename)
             if os.path.isdir(path) or not path.endswith('.json'):
                 continue
             with open(path, 'r') as f:
                 data = f.read()
-                r = session.post(BUILD_TELEMETRY_SERVER, data=data,
-                                 headers={'Content-Type': 'application/json'})
+                try:
+                    r = session.post(BUILD_TELEMETRY_SERVER, data=data,
+                                     headers={'Content-Type': 'application/json'})
+                except Exception as e:
+                    print('Exception posting to telemetry server: %s' % str(e))
+                    break
                 # TODO: some of these errors are likely not recoverable, as
                 # written, we'll retry indefinitely
                 if r.status_code != 200:
                     print('Error posting to telemetry: %s %s' %
                           (r.status_code, r.text))
                     continue
 
             os.rename(os.path.join(outgoing, filename),