MailPlus Forms


With the MailPlus Forms Plugin web masters can easily integrate web forms or online surveys created in MailPlus on pages and posts without any technical knowledge. MailPlus is an online marketing platform which contains a user-friendly form editor with a lot of features. For example, matrix questions, conditional questions, skip logic/branching, multi-paging, extensive features for validating answers from respondents, great e-mail confirmation possibilities and much more.


  1. Install the plugin.
  2. Activate the plugin through the ‘Plugins’ menu in WordPress
  3. Enter the Consumer Key and Consumer Secret through the ‘MailPlus Forms’ option in the ‘Settings’ menu in WordPress.
  4. Add a form in a post or a page through the “Add a MailPlus form” button in the HTML editor (TinyMCE)


July 4, 2019
It's very easy to add a form to your wordpress page if you're using Mailplus/Spotler as your email and automation software. However, CSS stylingo is always needed. In Mailplus/Spotler, you create a key. That key is neccessary to activate the plugin with your account. The form is shown as it's a list (so dots before every field or button) The form shows the calculating check, that is supposed to run on the background, but through the plugin is always visible (also as a list item) very annoying. They don't provide a list of fieldnames so adding CSS is not as easy as it should be. They don't update the plugin. So it doesn't feel safe. I think with a little extra effort they can make it work a lot better.
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Contributors & Developers

“MailPlus Forms” is open source software. The following people have contributed to this plugin.


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  • Fix iconv_set_encoding deprecated warning
  • Upgrade TinyMCE plugin to TinyMCE v4. TinyMCE v3 is no longer supported.
  • Move all PHP logic the plugin core which fixes the plugin running on WordPress installations with changed directories (e.d. Roots’ Bedrock)


  • Fix warnings while submitting a form


  • Fix for supporting HTTPS completely


  • Support external URL’s as last form page. This has been an option in MailPlus for quite a while and was not supported until now.
  • Support for prefilling forms inside WordPress. When linking to a page with a form add “?encId={encId}” to the URL in MailPlus.


  • Unset $_POST[‘formEncId’] after handling the post to prevent the handling of posted values more than once when multiple forms are used in one page


  • Changed __DIR__ to dirname(__FILE__) so the plugin works on PHP < 5.3.1


  • Plugin directory is “mailplus-forms”, not “mailplusforms”


  • Initial version released