SMTP Authentication

This article discusses SMTP authentication when using the Chilkat Ruby module for sending email.

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# file: SmtpAuthentication.rb

require 'chilkat'

# About SMTP Authentication when sending email.
mailman = Chilkat::CkMailMan.new()
mailman.UnlockComponent("anything for 30-day trial")

# Set your SMTP server's hostname
mailman.put_SmtpHost("smtp.comcast.net")

# If your SMTP server requires a authentication, set username/password
mailman.put_SmtpUsername("***")
mailman.put_SmtpPassword("***")

# Your SMTP server may or may not require authentication.  It often depends
# upon the location where the SMTP client is making the connection.  If the
# SMTP server is behind a firewall, it is often administered such that clients
# connecting from the same side of the firewall (i.e. within the network) can
# send email without authentication.  However, connections originating from
# outside the firewall DO require authentication.  This is quite often the
# case with cable modem and DSL ISP's.  
# If authentication is required, different SMTP servers support different authentication
# methods, some of which are more secure than others.  In the least secure scenario,
# your login/password is transmitted in clear-text (i.e. unencrypted) over the TCP/IP
# connection to the SMTP server.  This is with the "LOGIN" method.
# The "PLAIN" SMTP authentication method is effectively no better because the information
# is simply Base64 encoded.  The CRAM-MD5 and NTLM methods are secure because the
# login/password is sent encrypted.  However, if your connection to the SMTP server is
# SSL, or if you are using the STARTTLS option, it doesn't matter if the authentication
# method is LOGIN or PLAIN because the TCP/IP connection is SSL anyway.
# By default, Chilkat will choose the most secure authentication method available
# (as announced by the SMTP server during the initial "hello" handshake).
# If for some reason there is a problem, or if you desire less-secure authentication,
# you may explicitly set the SmtpAuthMethod property to: "LOGIN", "PLAIN", "CRAM-MD5", or "NTLM".
mailman.put_SmtpAuthMethod("LOGIN")

# Create an e-mail object
email = Chilkat::CkEmail.new()
email.put_Subject("How to send e-mail in the Ruby programming language")
email.put_Body("Email sent from a Ruby script")
email.put_From("Chilkat Support <support@chilkatsoft.com>")

# Add a few recipients...
email.AddTo("Matt","matt@chilkatsoft.com")
email.AddTo("TagTooga","admin@tagtooga.com")

# Send the email
success = mailman.SendEmail(email)
if not success
	mailman.SaveLastError("lastError.txt");
end