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Thomas Hoppe vanthome

  • n-fuse GmbH
  • Stuttgart
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vanthome / postfix-upgrade.txt
Created Mar 18, 2013
Consider smtpd_recipient_restrictions when upgrading to Postfix 3.10.0 MTA
View postfix-upgrade.txt
If you run a postfix MTA and find yourself unable to send mails from external eMail Clients like thunderbird, kmail etc.
And you see something like this in the logs:
postfix/smtpd[42360]: Anonymous TLS connection established ...
postfix/smtpd[42360]: NOQUEUE: reject: RCPT from xxx: 554 5.7.1 <>: Relay access denied; from=<> to=<> proto=ESMTP helo=<[xxx]>
Then you should consider the newly introduced smtpd_relay_restrictions option as described here:
vanthome / isClientOnSSl.js
Last active Dec 14, 2015
For nodejs: Find out whether a client connection which might be proxied by front-end apache or nginx server OR is directly terminated by node is protected by SSL / TLS
View isClientOnSSl.js
var util = require('utile'),
propUtil = require('./propUtil');
// Find out whether the client connection is encrypted
var isClientOnTls = function(req) {
var isEncrypted = true;
if(req.connection.encrypted === undefined) { // Derive from nodejs internals
isEncrypted = false;
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