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• smtp_tls documentation

Provides SMTP STARTTLS support for Ruby 1.8.6 (built-in for 1.8.7+). Simply require ‘smtp_tls’ and use the Net::SMTP#enable_starttls method to talk to servers that use STARTTLS.

  require 'net/smtp'
  begin
    require 'smtp_tls'
  rescue LoadError
  end

  smtp = Net::SMTP.new address, port
  smtp.enable_starttls
  smtp.start Socket.gethostname, user, password, authentication do |server|
    server.send_message message, from, to
  end

You can also test your SMTP connection settings using mail_smtp_tls:

  $ date | mail_smtp_tls smtp.example.com submission \
    "your username" "your password" plain \
    from@example.com to@example.com
  Using SMTP_TLS 1.0.3
  -> "220 smtp.example.com ESMTP XXX\r\n"
  <- "EHLO you.example.com\r\n"
  -> "250-smtp.example.com at your service, [192.0.2.1]\r\n"
  -> "250-SIZE 35651584\r\n"
  -> "250-8BITMIME\r\n"
  -> "250-STARTTLS\r\n"
  -> "250-ENHANCEDSTATUSCODES\r\n"
  -> "250 PIPELINING\r\n"
  <- "STARTTLS\r\n"
  -> "220 2.0.0 Ready to start TLS\r\n"
  TLS connection started
  <- "EHLO you.example.com\r\n"
  -> "250-smtp.example.com at your service, [192.0.2.1]\r\n"
  -> "250-SIZE 35651584\r\n"
  -> "250-8BITMIME\r\n"
  -> "250-AUTH LOGIN PLAIN\r\n"
  -> "250-ENHANCEDSTATUSCODES\r\n"
  -> "250 PIPELINING\r\n"
  <- "AUTH PLAIN BASE64_STUFF_HERE\r\n"
  -> "235 2.7.0 Accepted\r\n"
  <- "MAIL FROM:<from@example.com>\r\n"
  -> "250 2.1.0 OK XXX\r\n"
  <- "RCPT TO:<to@example.com>\r\n"
  -> "250 2.1.5 OK XXX\r\n"
  <- "DATA\r\n"
  -> "354  Go ahead XXX\r\n"
  writing message from String
  wrote 91 bytes
  -> "250 2.0.0 OK 1247028988 XXX\r\n"
  <- "QUIT\r\n"
  -> "221 2.0.0 closing connection XXX\r\n"

This will connect to smtp.example.com using the submission port (port 587) with a username and password of “your username” and “your password” and authenticate using plain-text auth (the submission port always uses SSL) then send the current date to to@example.com from from@example.com.

Debug output from the connection will be printed on stderr.

Changes:

• 1 minor enhancement
  • Added mail_smtp_tls executable to test SMTP connections
• 2 bug fixes
  • Suppress default DH parameters warning
  • Pass debug output down to child IOs