Learn to use the openssl command-line program - TechRepublic

Jan 23, 2009 SMTP auth, mail-sending & open-relay tests using openssl telnet example.com 25. For secure SMTP, you can use one of following: openssl s_client -starttls smtp -connect example.com:25 openssl s_client -starttls smtp -connect example.com:465 openssl s_client -starttls smtp -connect example.com:587. As soon as you connect to the server, run: ehlo example.com. You will get output like below as reply: How to test SMTP Authentication and StartTLS - Sysadmins May 17, 2014 Using openssl instead of telnet to test HTTPS, POP3S

May 17, 2014

Telnet – How to use Telnet is one of the earliest remote login protocols on the Internet. It was initally released in the early days of IP networking in 1969, and was for a long time the default way to access remote networked computers. It is a client-server protocol that provides the user a terminal session to the remote host from the telnet client application. RE: OpenSSL for telnet on IBM i? -- MIDRANGE-L Subject: Re: OpenSSL for telnet on IBM i? On Fri, Jan 29, 2016 at 2:41 PM, wrote: My boss says there's actually a thing now discouraging the use of SSL for intRAnet usage. Something about sniffing down the offenders or some such thing.

Test Your Connection to the Amazon® SES SMTP Interface

Troubleshooting Outbound Email Using Command Line Jun 04, 2018 tls - How do I use "openssl s_client" to test for (absence How can I use openssl s_client to verify that I've done this? Stack Exchange Network Stack Exchange network consists of 177 Q&A communities including Stack Overflow , the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. Mail: Connect TLS encrypted to a smtp server by telnet