Mail relaying

SMTP Auth testing via CLI

René Jorissen on June 30, 2016 0 Comments • Tags: #auth #cli #command-line #smtp

Just a quick note to describe the procedure for SMTP auth testing via the command-line. At first you need to encode username and password in Base64. This can be done in several ways. The easiest way would be via Next you can use the following commando’s via telnet to test SMTP AUTH. I always use … Read More

Mail relaying

Export StartTLS certificate from SMTP server

René Jorissen on May 5, 2015 2 Comments • Tags: #certificate #export #smtp #smtpoffice365com #starttls

While configuring Office365 as the messaging (SMTP) server within Aruba ClearPass, I needed to upload the certificate from the StartTLS session to the certificate trust list from ClearPass. I had to export the certificate for via the following OpenSSL command: openssl s_client -showcerts -starttls smtp -crlf -connect After running the command, you will see … Read More

Other stuff...

OpenSSL for testing TLS

René Jorissen on February 17, 2011 1 Comment • Tags: #crlf #openssl #smtp #starttls #s_client #s_server #test #tls

I was looking for a way to test the TLS configuration of a secure mail server and stumbled across a website called “OpenSSL Command-Line HOWTO”. This websites explains how to test a TLS connection using OpenSSL. The s_client and s_server options provide a way to launch SSL-enabled command-line clients and servers. There are other examples … Read More

Other stuff...

Barracuda – Outbound SMTP Host/Smart Host in Build

René Jorissen on December 3, 2009 0 Comments • Tags: #barracuda #build012 #host #outbound #relaying #smart #smtp

When upgrading from a build older then to a build 0.12 or above, you should pay attention to the Outbound SMTP host/Smart host configuration. This picture below shows the configuration option. The release notes tell the following: Fix: Now honors outbound BASIC > Administration > ‘SMTP host/Smarthost’ for mail delivery when relaying (recipient domain … Read More