From: Francis Cianfrocca <garbagecat10@...>
Date: 2006-07-30T22:07:37+09:00
Subject: Re: TCPSocket and RFC 821

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One more thing that affects localhost connections. I like to avoid
puts(some_line) in favor of write("#{some_line}\r\n") because on many
kernels, the latter will result in one kernel-crossing system call while the
former results in two. I haven't investigated but I suspect this is caused
by an implementation detail in Ruby.

On 7/30/06, Francis Cianfrocca <garbagecat10@gmail.com> wrote:
>
> This line:
> t.puts "\r\n.\r\n"
> puts one more linefeed on the output than you perhaps intended, which
> may account for the nil in your output. The QUIT command may be
> causing the localhost server-connection to close before your process
> has a chance to read the input. Meaning that the EINVAL error is
> generated by the gets call you make right after sending QUIT.
>
> Try the same program with a mail server located on a different machine
> and see if you get a different result. After sending QUIT on an SMTP
> connection, you don't really need to read the server response. (Unless
> you suspect for some reason the server will send an interesting
> error-response to your QUIT, which I've never seen in many years of
> working with SMTP servers.)
>
> On 7/30/06, Satish Talim <satish.talim@gmail.com> wrote:
> > I wanted to send an email from my desktop using a simple Ruby program.
> > I installed 1st SMTP Server
> > (http://www.emailarms.com/products/1st_smtp.html)  - an easy to use
> > SMTP mail relay server. It is used for relaying your email messages to
> > its destinations quickly and easily. For this server, I need to use
> > localhost and port 25 on my PC.
> >
> > Then the program I wrote was (based on RFC 821) -
> >
> > require 'socket'
> > t = TCPSocket.new('localhost', 25)
> > puts t.gets
> > t.puts 'HELO Welcome from Ruby'
> > puts t.gets
> > t.puts 'MAIL FROM:<abc@gmail.com>'
> > puts t.gets
> > t.puts 'RCPT TO:<abc@gmail.com>'
> > puts t.gets
> > t.puts 'DATA'
> > puts t.gets
> > t.puts 'Test Email from Ruby'
> > t.puts "\r\n.\r\n"
> > puts t.gets
> > t.puts 'QUIT'
> > puts t.gets
> > t.close
> >
> > However, while running the program, I get an error as follows:
> >
> > 220 Welcome to the 1st SMTP Server
> >
> > 250 Hello Welcome from Ruby
> >
> > 250 abc@gmail.com Address Okay
> >
> > 250 abc@gmail.com Address Okay
> >
> > 354 Start mail input; end with <CRLF>.<CRLF>
> >
> > nil
> > email.rb:15:in `write': Invalid argument (Errno::EINVAL)
> >         from email.rb:15:in `puts'
> >         from email.rb:15
> > >Exit code: 1
> >
> > I am unable to figure out what the problem is. All help appreciated.
> >
> >
>
>

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