GMX && Ruby Mail SMTP: "end of file reached"

Question

I'm unable to get Mail (or Pony for that matter) to connect to send an email via a smtp server with credentials, port number, and address parameter I know are right. However, when using a mail client (thunderbird, ink...etc) I'm able to connect just fine.

Here is the stack trace I'm getting:

ruby gmx_test.rb
/Users/sy/.rvm/rubies/ruby-2.1.0/lib/ruby/2.1.0/net/protocol.rb:153:in `read_nonblock': end of file reached (EOFError)
    from /Users/sy/.rvm/rubies/ruby-2.1.0/lib/ruby/2.1.0/net/protocol.rb:153:in `rbuf_fill'
    from /Users/sy/.rvm/rubies/ruby-2.1.0/lib/ruby/2.1.0/net/protocol.rb:134:in `readuntil'
    from /Users/sy/.rvm/rubies/ruby-2.1.0/lib/ruby/2.1.0/net/protocol.rb:144:in `readline'
    from /Users/sy/.rvm/rubies/ruby-2.1.0/lib/ruby/2.1.0/net/smtp.rb:937:in `recv_response'
    from /Users/sy/.rvm/rubies/ruby-2.1.0/lib/ruby/2.1.0/net/smtp.rb:554:in `block in do_start'
    from /Users/sy/.rvm/rubies/ruby-2.1.0/lib/ruby/2.1.0/net/smtp.rb:947:in `critical'
    from /Users/sy/.rvm/rubies/ruby-2.1.0/lib/ruby/2.1.0/net/smtp.rb:554:in `do_start'
    from /Users/sy/.rvm/rubies/ruby-2.1.0/lib/ruby/2.1.0/net/smtp.rb:519:in `start'
    from /Users/sy/.rvm/gems/ruby-2.1.0/gems/mail-2.5.4/lib/mail/network/delivery_methods/smtp.rb:112:in `deliver!'
    from /Users/sy/.rvm/gems/ruby-2.1.0/gems/mail-2.5.4/lib/mail/message.rb:2129:in `do_delivery'
    from /Users/sy/.rvm/gems/ruby-2.1.0/gems/mail-2.5.4/lib/mail/message.rb:234:in `deliver'
    from /Users/sy/.rvm/gems/ruby-2.1.0/gems/mail-2.5.4/lib/mail/mail.rb:140:in `deliver'
    from gmx_test.rb:29:in `<main>'

Here is the code generating:

require 'mail'

gmx_options = { :address              => "mail.gmx.com",
                :port                 => 465,
                :user_name            => '<username_redacted>@gmx.com',
                :password             => '<password_redacted>',
                :authentication       => 'plain',
                :enable_starttls_auto => true  }



Mail.defaults do
  delivery_method :smtp, gmx_options
end



Mail.deliver do
  to '<redacted>
  from '<username_redacted>@gmx.com'
  subject 'TEST'
  body 'Hi.'
end

Here is a screenshot of the server settings of one of the desktop email client that is able to send emails:

enter image description here

Final plot twist: this code works if I use gmail's smtp.

Thanks for any insight you guys may have!

In `gmx_options` hash, can you try adding `:domain => 'gmx.com'` ? — Jason Kim, Feb 14 '14 at 01:13
yeah that was a good idea actually. Unfortunately, it didn't work. — sybohy, Feb 14 '14 at 01:17
no luck. I think this is relevant: https://github.com/deanproxy/eMail/issues/7 — sybohy, Feb 14 '14 at 01:25

score 1 · Answer 1 · answered Jun 17 '17 at 07:25

I encountered this problem in 2017 and a simple change of port to 587 worked for me:

The german source https://hilfe.gmx.net/pop-imap/pop3/serverdaten.html essentially states that port 465 works with SSL-encryption, for STARTTLS-encryption you have to use port 587.

GMX && Ruby Mail SMTP: "end of file reached"

1 Answers1