telnet 25. For secure SMTP, you can use one of following: openssl s_client -starttls smtp -connect openssl s_client -starttls smtp -connect openssl s_client -starttls smtp -connect As soon as you connect to the server, run: ehlo You will get output like below as reply:

Learn to use the openssl command-line program - TechRepublic Apr 28, 2008 Telnet scenario: Securing Telnet with SSL The Telnet server initializes SSL, and checks the certificate information in the QIBM_QTV_TELNET_SERVER application ID. If the Telnet certificate configuration is correct, the Telnet server begins listening on the SSL port for client connections. A client initiates a request for access to the Telnet … OpenSSLをSSL/TLSクライアントとして使ってみる – Siguniang's … Aug 09, 2014 Re: openssl for telnet on IBM i? -- MIDRANGE-L

OpenSSLをSSL/TLSクライアントとして使ってみる – Siguniang's …

I have IPv6 on all my hosts. It seems that telnet uses IPv6 by default and this works. For example: telnet -6 puppet 8140 works but . telnet -4 puppet 8140 does not work. So there seems to be a problem with the IPv4 route. openssl seems to only (or by default) use IPv4 and therefore fails but telnet … Test Your Connection to the Amazon® SES SMTP Interface openssl s_client -crlf -quiet -starttls smtp -connect In the preceding command, replace with the URL of the Amazon SES SMTP endpoint for your AWS Region. For more information, see Regions and Amazon SES Binaries - OpenSSL

Windows: Install Telnet Client - CMD & PowerShell - ShellHacks

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 Hi, the SMTP protocol is ASCII based. In the past, the SMTP protocol goes unencrypted over the wire means you can simply send emails by connecting to the SMTP port 25 and enter some SMTP commands via telnet: Many provider does no longer accept such plain text connections. You can use openssl instead. Connect to Port 25 to your SMTP server and said Hello (EHLO). If connected the S