mail_to(email_address, name = nil, html_options = {}, &block) public

Creates a mailto link tag to the specified email_address, which is also used as the name of the link unless name is specified. Additional HTML attributes for the link can be passed in html_options.

mail_to has several methods for customizing the email itself by passing special keys to html_options.


  • :subject - Preset the subject line of the email.

  • :body - Preset the body of the email.

  • :cc - Carbon Copy additional recipients on the email.

  • :bcc - Blind Carbon Copy additional recipients on the email.


Prior to Rails 4.0, mail_to provided options for encoding the address in order to hinder email harvesters. To take advantage of these options, install the actionview-encoded_mail_to gem.


mail_to ""
# => <a href=""></a>

mail_to "", "My email"
# => <a href="">My email</a>

mail_to "", "My email", cc: "",
         subject: "This is an example email"
# => <a href="">My email</a>

You can use a block as well if your link target is hard to fit into the name parameter. ERB example:

<%= mail_to "" do %>
  <strong>Email me:</strong> <span></span>
<% end %>
# => <a href="">
       <strong>Email me:</strong> <span></span>
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January 20, 2009
5 thanks

Javascript encoding DOES work!

grosser assertion is false :

mail_to('', nil, :encode => :javascript)
# => "<script type=\"text/javascript\">eval(unescape('%64%6f%63%75%6d%65%6e%74%2e%77%72%69%74%65%28%27%3c%61%20%68%72%65%66%3d%22%6d%61%69%6c%74%6f%3a%78%78%78%40%78%78%78%2e%63%6f%6d%22%3e%78%78%78%40%78%78%78%2e%63%6f%6d%3c%2f%61%3e%27%29%3b'))</script>"

Use “nil” as the second parameter to tell mail_to that you want to use the first parameter for both text and email link

August 1, 2008
2 thanks

email_to('xxx@xxx','xxx@xxx',:encode=>'javascript') does NOT work

as i always want the email in the link text, email_to does not help me…

so here comes the rescue!

# Takes in an email address and (optionally) anchor text,
# its purpose is to obfuscate email addresses so spiders and
# spammers can't harvest them.
def js_antispam_email_link(email, linktext=email)
  user, domain = email.split('@')
  # if linktext wasn't specified, throw email address builder into js document.write statement
  linktext = "'+'#{user}'+'@'+'#{domain}'+'" if linktext == email 
  out =  "<noscript>#{linktext} #{user}(ät)#{domain}</noscript>\n"
  out += "<script language='javascript'>\n"
  out += "  <!--\n"
  out += "    string = '#{user}'+'@'+''+'#{domain}';\n"
  out += "    document.write('<a href='+'m'+'a'+'il'+'to:'+ string +'>#{linktext}</a>'); \n"
  out += "  //-->\n"
  out += "</script>\n"
  return out