wpsnoop: fix Mail Masta plugin conflicts, errors & issues
When the plugin Mail Masta conflicts or throws a PHP error we hope wpsnoop can help you to fix the issue quickly.
Discover which shortcodes wp-options PHP functions database tables and files are created by Mail Masta, plus learn which plugins and/or themes could be in conflict with Mail Masta.
Troubleshooting theme and plugin conflicts is easier when you know what Mail Masta leaves behind after uninstalling it from a WordPress installation, there is a list down below for your convenience.
Expert advice is recommended if you are not technically proficient with PHP, MySQL etc. View support options for Mail Masta
Get professional support for Mail Masta here
When you need professional help with WordPress: get help here
What does Mail Masta version 1.0 add to WordPress? Answers Here.
This is an automatically generated report - it is possible for Mail Masta to perform differently in your installation, previous versions before 1.0 may have created a different set of shortcodes, used different function names or could have created entirely different database tables to store settings and operate. This is not an exhaustive list but shows how version 1.0 of Mail Masta behaves when installed and removed on a clean installation of WordPress.
We have not tested individual shortcodes, features or settings of this plugin but instead have concentrated on the potential for obvious errors and conflicts which can occur, if you need help with the plugin in your local installation you can get WordPress help and support for Mail Masta by clicking here.
Our testing covered the free version of this plugin there may or may not be a paid version or premium version available for purchase that unlocks additional features and could behave in a slightly or very different manner.
Summary of WordPress plugin analysis: Mail Masta
Plugin Slug: mail-masta
Internal ID: 42820
Addon Type: Plugin
Version: 1.0
Price:
Free
Source: WordPress.org
Files: 136 (3.29MB)
Short Codes: [ / ] 1
Database Tables: 9
Function Count: 41
Code Review: Search Provit
Which new files does Mail Masta add to WordPress?
This section will populate with a table showing an icon, size and filepath.
The plugin Mail Masta added 136 new files when it was installed with WP-CLI in our WordPress test environment.
| Type & Path | Size | Conflicts |
|---|---|---|
| wp-content/plugins/mail-masta/ | 3.29MB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/amazon_api/ | 28.31kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/amazon_api/SimpleEmailService.php | 14.63kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/amazon_api/SimpleEmailServiceMessage.php | 8.20kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/amazon_api/SimpleEmailServiceRequest.php | 5.48kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/inc/ | 566.03kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/inc/ajax_listing.php | 365.00B | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/inc/api_settings_ajax.php | 1.35kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/inc/autoresponder/ | 127.02kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/inc/autoresponder/ajax_listing.php | 365.00B | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/inc/autoresponder/api_settings_ajax.php | 1.05kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/inc/autoresponder/campaign_delete.php | 240.00B | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/inc/autoresponder/campaign_edit.php | 6.65kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/inc/autoresponder/campaign_save.php | 7.05kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/inc/autoresponder/campaign/ | 107.99kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/inc/autoresponder/campaign/ajaxreport.php | 746.00B | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/inc/autoresponder/campaign/campaign-delete.php | 207.00B | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/inc/autoresponder/campaign/create-campaign.php | 21.31kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/inc/autoresponder/campaign/cron_autoresponder.php | 5.44kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/inc/autoresponder/campaign/imm_after_subs.php | 4.51kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/inc/autoresponder/campaign/post_campaign_send.php | 6.55kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/inc/autoresponder/campaign/save-update_autoresponder.php | 12.51kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/inc/autoresponder/campaign/test_mail.php | 5.42kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/inc/autoresponder/campaign/view-campaign.php | 51.31kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/inc/autoresponder/duplicate_responder.php | 2.26kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/inc/autoresponder/responder_delete.php | 386.00B | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/inc/autoresponder/responder_paused.php | 288.00B | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/inc/autoresponder/responder_play.php | 288.00B | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/inc/autoresponder/view-campaign-mail.php | 505.00B | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/inc/campaign_delete.php | 353.00B | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/inc/campaign_edit.php | 7.22kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/inc/campaign_save.php | 9.21kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/inc/campaign/ | 87.18kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/inc/campaign/ajax_camp_send.php | 7.94kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/inc/campaign/ajaxreport.php | 559.00B | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/inc/campaign/campaign-delete.php | 365.00B | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/inc/campaign/count_of_send.php | 294.00B | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/inc/campaign/create-campaign.php | 21.31kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/inc/campaign/demo-view-campaign.php | 12.46kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/inc/campaign/immediate_campaign.php | 11.07kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/inc/campaign/post_campaign_send.php | 1.70kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/inc/campaign/test_mail.php | 4.60kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/inc/campaign/view-campaign-list.php | 3.98kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/inc/campaign/view-campaign.php | 22.94kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/inc/duplicate_campaign.php | 2.26kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/inc/form_listing.php | 2.10kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/inc/lists/ | 117.09kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/inc/lists/add_member.php | 19.74kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/inc/lists/create-list.php | 22.33kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/inc/lists/csvdata.php | 4.09kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/inc/lists/csvexport.php | 1.56kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/inc/lists/csvimport.php | 1.06kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/inc/lists/delete-list.php | 392.00B | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/inc/lists/delete-member.php | 610.00B | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/inc/lists/demo_list.php | 6.10kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/inc/lists/edit_member.php | 7.52kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/inc/lists/edit-list.php | 24.20kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/inc/lists/file.php | 34.00B | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/inc/lists/php_errorlog | 13.06kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/inc/lists/uploads/ | 731.00B | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/inc/lists/uploads/__MACOSX/ | No known conflicts with other themes or plugins. | |
| wp-content/plugins/mail-masta/inc/lists/uploads/upload.php | 731.00B | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/inc/lists/view-list.php | 15.70kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/inc/mail-autoresponder-data.php | 78.78kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/inc/mail-campaign-data.php | 73.15kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/inc/mail-license-data.php | 4.49kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/inc/mail-list-data.php | 14.99kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/inc/mail-masta-autoresponders.php | 1.81kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/inc/mail-masta-campaign.php | 1.76kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/inc/mail-masta-delete.php | 1.61kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/inc/mail-masta-lists.php | 1.92kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/inc/mail-masta-settings.php | 797.00B | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/inc/mail-settings-data.php | 23.05kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/inc/masta_license.php | 1.35kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/inc/resp.php | 955.00B | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/inc/subscriber_list.php | 6.79kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/inc/view-campaign-mail.php | 505.00B | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/lib/ | 2.62MB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/lib/bootstrap-timepicker.js | 27.17kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/lib/bootstrap.js | 57.76kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/lib/Chart.js | 46.24kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/lib/Chart.min.js | 19.37kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/lib/component.json | 264.00B | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/lib/css/ | 1.35MB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/lib/css/bootstrap.css | 131.96kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/lib/css/font-awesome.min.css | 17.37kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/lib/css/images/ | 1.12MB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/lib/css/images/2.png | 83.53kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/lib/css/images/3.png | 27.29kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/lib/css/images/4.png | 25.54kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/lib/css/images/5.png | 28.98kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/lib/css/images/9-2.png | 142.12kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/lib/css/images/9.png | 50.73kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/lib/css/images/b-3.png | 41.99kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/lib/css/images/b-4.png | 38.25kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/lib/css/images/b-5.png | 44.04kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/lib/css/images/b-9-2.png | 71.20kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/lib/css/images/b-9.png | 197.89kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/lib/css/images/calendar.png | 292.00B | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/lib/css/images/green_check.jpeg | 613.00B | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/lib/css/images/iam-create-mailmasta-user (1).jpg | 76.71kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/lib/css/images/iam-create-mailmasta-user.jpg | 76.71kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/lib/css/images/loading.gif | 3.13kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/lib/css/images/mailmasta-finalmail.png | 6.69kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/lib/css/images/report-icon.png | 2.87kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/lib/css/images/select-icons_new.png | 1.05kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/lib/css/images/select-icons.png | 1.25kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/lib/css/images/unnamed.jpg | 118.09kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/lib/css/images/verified-senders.jpg | 108.70kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/lib/css/images/view-icon.png | 3.18kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/lib/css/jquery-ui.css | 37.08kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/lib/css/jquery.datetimepicker.css | 11.11kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/lib/css/jquery.selectbox.css | 2.56kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/lib/css/mail-masta.css | 18.03kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/lib/css/mm_frontend.css | 7.36kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/lib/css/validationEngine.jquery.css | 3.19kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/lib/custom.js | 4.89kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/lib/fonts/ | 419.06kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/lib/fonts/fontawesome-webfont.eot | 37.31kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/lib/fonts/fontawesome-webfont.svg | 198.22kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/lib/fonts/fontawesome-webfont.ttf | 78.76kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/lib/fonts/fontawesome-webfont.woff | 43.39kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/lib/fonts/FontAwesome.otf | 61.38kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/lib/jquery-ui-timepicker-addon.js | 74.71kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/lib/jquery-ui.js | 455.79kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/lib/jquery.min.js | 91.67kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/lib/jquery.selectbox-0.2.min.js | 9.08kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/lib/jquery.validationEngine-en.js | 10.56kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/lib/jquery.validationEngine.js | 67.10kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/lib/LICENSE.md | 1.03kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/lib/readme.md | 3.63kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/lib/subscriber.js | 6.31kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/lib/subscriber1.js | 5.96kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/lib/validation.js | 3.34kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/plugin-interface.php | 87.97kB | No known conflicts with other themes or plugins. |
| wp-content/plugins/mail-masta/readme.txt | 2.20kB | No known conflicts with other themes or plugins. |
Which new shortcodes does Mail Masta add to WordPress?
The plugin Mail Masta added 1 new shortcode when it was installed with WP-CLI in our WordPress test environment.
| ShortCode | Known Plugin or Theme conflicts | |
|---|---|---|
| [insert-form] | The insert-form shortcode doesn't have any known conflicts with other themes or plugins. |
Note: We have not yet checked to see if these shortcodes work as expected in pages, posts, sidebar widgets, or when set as the page title, in content, in the excert, in menus or anywhere else within a WordPress installation. A shortcode could produce errors due to parameters added when it is used, or if the plugin is updated and the format of the shortcode has changed.
Which new database tables are created by the WordPress plugin Mail Masta?
Mail Masta created 9 new database tables when it was installed in our test environment:
| Table name | Known Plugin or Theme conflicts |
|---|---|
| wp_masta_campaign | The wp_masta_campaign table doesn't have any known conflicts with other themes or plugins. |
| wp_masta_cronapi | The wp_masta_cronapi table doesn't have any known conflicts with other themes or plugins. |
| wp_masta_list | The wp_masta_list table doesn't have any known conflicts with other themes or plugins. |
| wp_masta_reports | The wp_masta_reports table doesn't have any known conflicts with other themes or plugins. |
| wp_masta_responder | The wp_masta_responder table doesn't have any known conflicts with other themes or plugins. |
| wp_masta_responder_reports | The wp_masta_responder_reports table doesn't have any known conflicts with other themes or plugins. |
| wp_masta_settings | The wp_masta_settings table doesn't have any known conflicts with other themes or plugins. |
| wp_masta_subscribers | The wp_masta_subscribers table doesn't have any known conflicts with other themes or plugins. |
| wp_masta_support | The wp_masta_support table doesn't have any known conflicts with other themes or plugins. |
After uninstalling and deleting Mail Masta using WP-CLI there were 9 database tables that still remained:
| Table name | Status |
|---|---|
| wp_masta_campaign | Orphan/Zombie |
| wp_masta_cronapi | Orphan/Zombie |
| wp_masta_list | Orphan/Zombie |
| wp_masta_reports | Orphan/Zombie |
| wp_masta_responder | Orphan/Zombie |
| wp_masta_responder_reports | Orphan/Zombie |
| wp_masta_settings | Orphan/Zombie |
| wp_masta_subscribers | Orphan/Zombie |
| wp_masta_support | Orphan/Zombie |
Click the table name above for more information on what the orphan tables could mean to your WordPress installation and some tips on how to deal with it.
Which new options are added to the wp-options table by Mail Masta?
When Mail Masta was activated and loaded for the first time it created 5 new options in the wp_options table. Any known conflicts will be shown in red.
| Option Name | Known Conflicts | |
|---|---|---|
| table_db_version | Potential conflict with 1 plugin or theme | |
| camp | The camp option doesn't have any known conflicts with other themes or plugins. | |
| list | The list option doesn't have any known conflicts with other themes or plugins. | |
| msetting | The msetting option doesn't have any known conflicts with other themes or plugins. | |
| widget_mmasta_widget | The widget_mmasta_widget option doesn't have any known conflicts with other themes or plugins. | |
During use Mail Masta may or may not create more options depending on how the plugin is configured and depending on which other themes and plugins are active in your specific hosting environment.
After disabling and deleting Mail Masta there were 6 options still present in the wp-options table:
Contact Mail Masta experts for help
What new PHP functions does Mail Masta declare when it is active?
Installing Mail Masta added 41 new function to Wordpress at run-time. These functions are internal and generally aren't meant to be used except by developpers who wish to interface with the plugin to enhance or alter its behavior.
Using Mail Masta from the command line with WP-CLI
The following commands are provided for convenience and should only be used if you understand how WP-CLI works. These commands refer to a single WordPress instance and may need to be modified if you are working with a Multisite installation.
How to install Mail Masta from the command line with WP-CLI
Navigate to the root of your WordPress installation and type the following command:
wp plugin install mail-masta
How to activate Mail Masta from the command line with WP-CLI
To immediately activate Mail Masta after WP-CLI downloads the latest version you can use the following command:
wp plugin install mail-masta --activate
How to reinstall Mail Masta from the command line with WP-CLI
To force a reinstallation of Mail Masta which overwrites the current plugin without asking for confirmation you can use the following command:
wp plugin install mail-masta --force
How to update Mail Masta to the latest version from the command line with WP-CLI
wp plugin update mail-masta
How to delete Mail Masta from the command line with WP-CLI
wp plugin delete mail-masta
Where can you download earlier versions of Mail Masta?
Whenever possible you should use the latest version of plugins and themes, however if you have recently updated and discovered that you need to install an earlier version you may be able to download other versions of Mail Masta from the WordPress repository by visiting this link.
Please note that installing earlier versions of a theme or plugin is not generally a recommended course of action for most users and could re-introduce security, stability or other issues in Mail Masta
About our testing enviroment
Tests were conducted using Apache 2.4.29, PHP 7.2 on Ubuntu 18.04, MySQL 5.7.33 and WordPress 5.9
It is very possible that different versions of PHP such as PHP 8.0, PHP 7.4, or PHP 7.3 could behave differently with Mail Masta. Different versions of WordPress could implement the features of this plugin in slightly different ways as well.
