post '/contact-us' do
    require 'pony'
    first_name  = params[:first_name]
    last_name = params[:last_name]
    mail = params[:mail]
    subject = params[:subject]
    body  = params[:body]

Pony.options = {
  :via => :smtp,
  :via_options => {
    :address              => 'smtp.zoho.com',
    :location             => '/c/sendmail/./sendmail',
    :ssl                  => true,
    :arguments            => '-t',
    :port                 => '465',
    # :enable_starttls_auto => true,
    :user_name            => 'username',
    :password             => "password",
    :authentication       => :login, # :plain, :login, :cram_md5, no auth by default
    :domain               => "localhost",
    # :tls                => true
  }
}


    Pony.mail(
        :to => 'sales@nlm-marketing.com',
        :from => first_name + '<' + mail + '>',
        :reply_to => mail,
        :subject => subject,
        :body => body)



    redirect '/success'
end

c:/RailsInstaller/Ruby2.1.0/lib/ruby/2.1.0/net/smtp.rb in check_auth_response
        raise SMTPAuthenticationError, res.message
c:/RailsInstaller/Ruby2.1.0/lib/ruby/2.1.0/net/smtp.rb in auth_plain
      check_auth_response res
c:/RailsInstaller/Ruby2.1.0/lib/ruby/2.1.0/net/smtp.rb in authenticate
      send auth_method(authtype), user, secret
c:/RailsInstaller/Ruby2.1.0/lib/ruby/2.1.0/net/smtp.rb in do_start
      authenticate user, secret, (authtype || DEFAULT_AUTH_TYPE) if user
c:/RailsInstaller/Ruby2.1.0/lib/ruby/2.1.0/net/smtp.rb in start
          do_start helo, user, secret, authtype
main.rb in block in <main>
    Pony.mail(
c:/RailsInstaller/Ruby2.1.0/lib/ruby/2.1.0/webrick/httpserver.rb in service
      si.service(req, res)
c:/RailsInstaller/Ruby2.1.0/lib/ruby/2.1.0/webrick/httpserver.rb in run
          server.service(req, res)
c:/RailsInstaller/Ruby2.1.0/lib/ruby/2.1.0/webrick/server.rb in block in start_thread
          block ? block.call(sock) : run(sock)
GET
No GET data.
POST
Variable    Value
body
"Testing"
first_name
"Michael"
last_name
"Stokes"
mail
"mjstokes1986@att.net"
subject
"Test"
COOKIES
No cookie data.
Rack ENV
Variable    Value
CONTENT_LENGTH
89
CONTENT_TYPE
application/x-www-form-urlencoded
GATEWAY_INTERFACE
CGI/1.1
HTTP_ACCEPT
text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
HTTP_ACCEPT_ENCODING
gzip, deflate
HTTP_ACCEPT_LANGUAGE
en-US,en;q=0.8
HTTP_CACHE_CONTROL
max-age=0
HTTP_CONNECTION
keep-alive
HTTP_HOST
localhost:4567
HTTP_ORIGIN
http://localhost:4567
HTTP_REFERER
http://localhost:4567/contact-us
HTTP_UPGRADE_INSECURE_REQUESTS
1
HTTP_USER_AGENT
Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/51.0.2704.103 Safari/537.36
HTTP_VERSION
HTTP/1.1
PATH_INFO
/contact-us
QUERY_STRING
REMOTE_ADDR
::1
REMOTE_HOST
MSTOKES
REQUEST_METHOD
POST
REQUEST_PATH
/contact-us
REQUEST_URI
http://localhost:4567/contact-us
SCRIPT_NAME
SERVER_NAME
localhost
SERVER_PORT
4567
SERVER_PROTOCOL
HTTP/1.1
SERVER_SOFTWARE
WEBrick/1.3.1 (Ruby/2.1.5/2014-11-13)
rack.errors
#<Object:0x3471090>
rack.hijack
#<Proc:0x5dab6a8@c:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/rack-1.6.4/lib/rack/handler/webrick.rb:76 (lambda)>
rack.hijack?
true
rack.hijack_io
nil
rack.input
#<StringIO:0x5dab768>
rack.logger
#<Logger:0x5dd4e08 @progname=nil, @level=1, @default_formatter=#<Logger::Formatter:0x5dd4df0 @datetime_format=nil>, @formatter=nil, @logdev=#<Logger::LogDevice:0x5dd4dc0 @shift_size=nil, @shift_age=nil, @filename=nil, @dev=#<IO:<STDERR>>, @mutex=#<Logger::LogDevice::LogDeviceMutex:0x5dd4da8 @mon_owner=nil, @mon_count=0, @mon_mutex=#<Mutex:0x5dd4d78>>>>
rack.multiprocess
false
rack.multithread
true
rack.request.cookie_hash
{}
rack.request.form_hash
{"first_name"=>"Michael", "last_name"=>"Stokes", "mail"=>"mjstokes1986@att.net", "subject"=>"Test", "body"=>"Testing"}
rack.request.form_input
#<StringIO:0x5dab768>
rack.request.form_vars
first_name=Michael&last_name=Stokes&mail=mjstokes1986%40att.net&subject=Test&body=Testing
rack.request.query_hash
{}
rack.request.query_string
rack.run_once
false
rack.url_scheme
http
rack.version
[1, 3]
sinatra.accept
[#<Sinatra::Request::AcceptEntry:0x63e7618 @entry="text/html", @type="text/html", @params={}, @q=1.0>, #<Sinatra::Request::AcceptEntry:0x63e74f8 @entry="application/xhtml+xml", @type="application/xhtml+xml", @params={}, @q=1.0>, #<Sinatra::Request::AcceptEntry:0x63e71f8 @entry="image/webp", @type="image/webp", @params={}, @q=1.0>, #<Sinatra::Request::AcceptEntry:0x63e7408 @entry="application/xml;q=0.9", @type="application/xml", @params={}, @q=0.9>, #<Sinatra::Request::AcceptEntry:0x63e7108 @entry="*/*;q=0.8", @type="*/*", @params={}, @q=0.8>]
sinatra.commonlogger
true
sinatra.error
#<Net::SMTPAuthenticationError: 535 Authentication Failed >
sinatra.route
POST /contact-us

Pony.mail({
  :to => 'you@example.com',
  :from => first_name + '<' + mail + '>',
  :reply_to => mail,
  :subject => subject,
  :body => body,
  :via => :smtp,
  :via_options => {
    :address              => 'smtp.zoho.com',
    :port                 => 465,
    :user_name            => 'user@email.com',
    :password             => 'a password',
    :authentication       => :login,
    :ssl                  => true,
    :tls                  => true,
    :enable_starttls_auto => true
  }
})