To authenticate on the mail server using auth login, you need to convert the user name and password from which the message will be sent to. Below i describe how to login to an exim email server using telnet, authenticate via smtp authentication, and then send test emails. Once you receive response code 250 as above, type auth login and enter. When a radius authentication server is deployed on a network, users can be authenticated through radius. Simple troubleshooting for smtp via telnet and openssl zimbra. In exchange terms, auth login is the basic authentication, when user name and password are transmitted over the network encoded using base64 algorithm. On most versions of windows, youll need to install the telnet client before you can. Halon mta blog how to test smtp servers using the commandline. Sending email via telnet using smtp authentication.
Filter incoming to this port or disable the telnet service and use ssh instead, or use inetadm to. Understand the commands, auth login ehlo, mail from. Solaris 10 forced login telnet authentication bypass. Below are instructions on how to test smtp auth against a mail server using telnet and entering the commands by hand the first thing you need to do is get a base64 encoding of your username and password. Make sure that the authentication tab for the receive connector looks similar to this.
This page explains the microsoft syntax that smtp needs to login to an exchange server 2010. How to test smtp authentication and starttls sysadmins. This post shows you how to test smtp servers, verify smtp authentication and starttls encrypted connections from the linux and windows command line. Use telnet to login to exim smtp server, perform smtp. If a server doesnt require an authentication openrelay server, you can send an email from telnet command prompt. Sending email via telnet using smtp authentication in some cases, in order to test or diagnose email service, an administrator has to check the sending of emails through their exchange servers and other email servers from certain hosts. Sending email via telnet using smtp authentication windows os. Use telnet to connect to the computer running the telnet server service at telnet. In this example, well show how to perform auth login authentication on the smtp server and send an email using telnet console. For auth is login youll need to get the login encoding as described above. How to configure exchange to allow auth login to work.
How to perform auth digestmd5 crammd5 command line. There are a couple ways to do this, the example below uses perl. Troubleshooting smtp auth login with telnet in exchange server 2010. I would just like to know what the effect would by by unselecting basic authentication. Sending or viewing emails using telnet media temple. Example for configuring authentication for telnet login users. It was built to help companies secure their networks by proactively testing all their hosts and networking devices for poor passwords. Troubleshooting smtp auth login telnet exchange server.
This config will describe a procedure to login to smtp server using auth digestmd5 crammd5 encryption authentication method via telnet. You may need to install the telnet client to run telnet commands. Solution install patches 12006802 sparc or 12006902 i386, which are available from sun. Configure postfix to relay to exchange server with ntlm authentication pingback. Use telnet to test smtp communication on exchange servers. Ncrack is a highspeed network authentication cracking tool.
Enter your user name and password to log in, or click to register new account. You can then send the auth login command and then first the username and then the password. A default postfix install nonzcs might have something like. Return to login if you dont get an email from us within a few minutes, please check your spam filter. On the client end of things, the accepted types of authentication are provided on the auth line in this case, plain and login.