From 8b42d2f9005aebe25b534a67112def59d1b85532 Mon Sep 17 00:00:00 2001
From: Adar Nimrod <nimrod@shore.co.il>
Date: Sat, 1 May 2021 01:12:47 +0300
Subject: [PATCH] Remove SMTP check on port 25.
Outbound traffic on port 25 is restricted by AWS. Removing the
restriction will raise the cost of the project.
---
src/smtp.py | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/src/smtp.py b/src/smtp.py
index 3b0509b..b8947dd 100644
--- a/src/smtp.py
+++ b/src/smtp.py
@@ -23,7 +23,11 @@ def check_smtp(port):
def handler(event, context): # pylint: disable=unused-argument
"""Lambda event handler."""
- for port in [25, 587]:
+ # Port 25 is blocked for Lambda functions. To remove the restriction, the
+ # functions need to execute inside a VPN with a NAT gateway. This will
+ # raise the cost. For now assume that if the submission port is working,
+ # the smtp port is working too (same gateway, same host, same processes).
+ for port in [587]:
success, message = check_smtp(port)
print(message)
if not success:
--
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