Spotler Mail+ Forms


With the Spotler Mail+ Forms Plugin web masters can easily integrate web forms or online surveys created in Spotler on pages and posts without any technical knowledge. Spotler Mail+ 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.


This plugin provides 1 block.

  • Spotler Mail+ Forms


  1. Install the plugin.
  2. Activate the plugin through the ‘Plugins’ menu in WordPress
  3. Enter the Consumer Key and Consumer Secret through the ‘Spotler Mail+ Forms’ option in the ‘Settings’ menu in WordPress.
  4. Add a form in a post or a page through the “Add Spotler Mail+ 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

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


“Spotler Mail+ Forms” has been translated into 1 locale. Thank you to the translators for their contributions.

Translate “Spotler Mail+ Forms” into your language.

Interested in development?

Browse the code, check out the SVN repository, or subscribe to the development log by RSS.



  • Fixed: Security issue in mail-plus forms.
  • Updated composer packages.


  • Changed: Naming convention from “Spotler Forms” to “Spotler Mail+ Forms”.
  • Added: Gutenberg support by adding a Gutenberg block.
  • Fixed: Refreshing unique id dynamically now also works for Table forms.


  • Sorting the forms within the TinyMCE element.
  • Adding function that retrieves form dynamically.
  • Making the abInfo unique for every page view(even when cached).
  • Updated composer packages.


  • Updated settings page url in plugin description(plugins page).
  • Updated the icon that is used within the toolbar for the TinyMCE editor.


  • Enhanced allowing only certain HTML tags when using echo on an HTML string.
  • Updated translation strings.


  • Enhanced escaping in form fields.
  • Changed the text domain mentioning from a constant to hardcoded strings.


  • Complete refactor of plugin
  • Fix security issues regarding escaping values.
  • Changed naming convention from MailPlus Forms to Spotler Forms.
  • Added Dutch translations.
  • Added exceptions.


  • 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