diff --git a/cotisations/utils.py b/cotisations/utils.py
index c370fe59..5da8eee0 100644
--- a/cotisations/utils.py
+++ b/cotisations/utils.py
@@ -50,7 +50,7 @@ def send_mail(mail, request):
     """Wrapper for Django's EmailMessage.send which handles errors"""
     try:
         mail.send()
-    except SMTPException as e:
+    except (SMTPException, ConnectionError) as e:
         if request:
             messages.error(
                 request,
diff --git a/re2o/mail_utils.py b/re2o/mail_utils.py
index 065a9506..86d446fb 100644
--- a/re2o/mail_utils.py
+++ b/re2o/mail_utils.py
@@ -36,7 +36,7 @@ def send_mail(request, *args, **kwargs):
     try:
         kwargs["fail_silently"] = request is None
         django_send_mail(*args, **kwargs)
-    except SMTPException as e:
+    except (SMTPException, ConnectionError) as e:
         messages.error(
             request,
             _("Failed to send email: %(error)s.") % {