wpsnoop: fix Newsletter Manager plugin conflicts, errors & issues
When the plugin Newsletter Manager 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 Newsletter Manager, plus learn which plugins and/or themes could be in conflict with Newsletter Manager.
Troubleshooting theme and plugin conflicts is easier when you know what Newsletter Manager 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 Newsletter Manager
When you need professional help with WordPress: get help here
What does Newsletter Manager version 1.5.1 add to WordPress? Answers Here.
This is an automatically generated report - it is possible for Newsletter Manager to perform differently in your installation, previous versions before 1.5.1 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 1.5.1 of Newsletter Manager 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 Newsletter Manager 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: Newsletter Manager
Which new files does Newsletter Manager add to WordPress?
This section will populate with a table showing an icon, size and filepath.
Type & Path | Size | Conflicts |
---|---|---|
wp-content/plugins/newsletter-manager/ | 1.02MB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/add_shortcode_tinymce.php | 781.00B | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/admin/ | 278.35kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/admin/about.php | 17.07kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/admin/add_emails.php | 2.76kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/admin/add_smtp.php | 6.07kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/admin/admin-notices.php | 4.32kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/admin/ajax-backlink.php | 826.00B | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/admin/attachment_delete.php | 1.24kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/admin/campaign_delete.php | 1.57kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/admin/campaign_status.php | 1.58kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/admin/create_campaign.php | 20.51kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/admin/deactivate.php | 1.17kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/admin/edit_campaign.php | 23.76kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/admin/edit_email.php | 4.78kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/admin/email_activate.php | 2.01kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/admin/email_addresses.php | 12.59kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/admin/email_campaigns.php | 14.11kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/admin/email_delete.php | 1.63kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/admin/email_unsubscribe.php | 2.02kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/admin/footer.php | 7.61kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/admin/group.php | 1.71kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/admin/header.php | 3.86kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/admin/import_export.php | 23.58kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/admin/install.php | 17.75kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/admin/manage_smtp.php | 6.00kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/admin/menu.php | 10.01kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/admin/newsletter_manager_settings.php | 35.34kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/admin/preview.php | 1.58kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/admin/restart.php | 4.20kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/admin/search_emails.php | 5.53kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/admin/send_mail.php | 9.94kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/admin/smtp_delete.php | 1.43kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/admin/smtp_edit.php | 7.92kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/admin/smtp_status.php | 1.77kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/admin/status.php | 5.95kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/admin/subscription_code.php | 1.44kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/admin/suggest_feature.php | 3.14kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/admin/test_mail.php | 6.35kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/admin/tinymce_filters.php | 1.14kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/admin/uninstall.php | 4.09kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/ajax-handler.php | 172.00B | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/confirmation.php | 6.99kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/cron.php | 11.07kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/css/ | 65.57kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/css/images/ | 23.85kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/css/images/ui-anim_basic_16x16.gif | 1.52kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/css/images/ui-bg_flat_0_aaaaaa_40x100.png | 180.00B | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/css/images/ui-bg_flat_75_ffffff_40x100.png | 178.00B | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/css/images/ui-bg_glass_55_fbf9ee_1x400.png | 120.00B | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/css/images/ui-bg_glass_65_ffffff_1x400.png | 105.00B | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/css/images/ui-bg_glass_75_dadada_1x400.png | 111.00B | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/css/images/ui-bg_glass_75_e6e6e6_1x400.png | 110.00B | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/css/images/ui-bg_glass_95_fef1ec_1x400.png | 119.00B | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/css/images/ui-bg_highlight-soft_75_cccccc_1x100.png | 101.00B | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/css/images/ui-icons_222222_256x240.png | 4.27kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/css/images/ui-icons_2e83ff_256x240.png | 4.27kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/css/images/ui-icons_454545_256x240.png | 4.27kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/css/images/ui-icons_888888_256x240.png | 4.27kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/css/images/ui-icons_cd0a0a_256x240.png | 4.27kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/css/jquery-ui.css | 30.76kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/css/xyz_em_styles.css | 10.96kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/demo_unsubscription.php | 80.00B | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/direct_call.php | 1.31kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/download.php | 1.09kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/editor_plugin.js.php | 1.54kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/emoji.php | 19.93kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/images/ | 565.46kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/images/active.png | 1.69kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/images/close.png | 5.78kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/images/cross.png | 764.00B | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/images/delete.png | 3.59kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/images/donate.png | 3.45kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/images/edit.png | 3.18kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/images/emoji.png | 467.80kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/images/facebook.png | 668.00B | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/images/gplus.png | 1.06kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/images/linkedin.png | 887.00B | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/images/mailsend.png | 5.29kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/images/new_star.png | 4.65kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/images/orange_buynow.png | 5.08kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/images/pause.png | 1.59kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/images/pending.png | 1.99kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/images/plugin.png | 1.16kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/images/preview.png | 4.43kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/images/restart.png | 1.88kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/images/sendtestmail.png | 3.21kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/images/star.png | 3.35kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/images/suggest.png | 3.30kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/images/support.png | 724.00B | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/images/tick.png | 931.00B | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/images/twitter.png | 0.98kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/images/unsubscribe.png | 4.64kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/images/xyz_logo.png | 9.26kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/images/xyz.png | 24.23kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/js/ | 2.31kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/js/notice.js | 300.00B | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/js/tooltip.js | 2.01kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/languages/ | 24.76kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/languages/newsletter-manager-ar.mo | 2.68kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/languages/newsletter-manager-de_DE.mo | 2.24kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/languages/newsletter-manager-es_ES.mo | 2.36kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/languages/newsletter-manager-fr_FR.mo | 2.34kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/languages/newsletter-manager-it_IT.mo | 2.31kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/languages/newsletter-manager-ja.mo | 2.67kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/languages/newsletter-manager-pt_PT.mo | 2.29kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/languages/newsletter-manager-ru_RU.mo | 2.96kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/languages/newsletter-manager-zh_CN.mo | 2.15kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/languages/newsletter-manager.mo | 471.00B | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/languages/newsletter-manager.po | 2.31kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/newsletter-manager.php | 2.84kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/readme.txt | 11.04kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/shortcode_handler.php | 1.68kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/shortcodes/ | 12.10kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/shortcodes/confirm.php | 543.00B | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/shortcodes/htmlcode.php | 10.18kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/shortcodes/thanks.php | 852.00B | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/shortcodes/unsubscribe.php | 572.00B | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/subscription.php | 12.33kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/unsubscription.php | 6.59kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/widget.php | 15.00kB | No known conflicts with other themes or plugins. |
wp-content/plugins/newsletter-manager/xyz-functions.php | 6.28kB | No known conflicts with other themes or plugins. |
Which new shortcodes does Newsletter Manager add to WordPress?
ShortCode | Known Plugin or Theme conflicts | |
---|---|---|
[xyz_em_confirm] | The xyz_em_confirm shortcode doesn't have any known conflicts with other themes or plugins. | |
[xyz_em_subscription_html_code] | The xyz_em_subscription_html_code shortcode doesn't have any known conflicts with other themes or plugins. | |
[xyz_em_thanks] | The xyz_em_thanks shortcode doesn't have any known conflicts with other themes or plugins. | |
[xyz_em_unsubscribe] | The xyz_em_unsubscribe 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 Newsletter Manager?
Table name | Known Plugin or Theme conflicts |
---|---|
wp_xyz_em_additional_field_info | The wp_xyz_em_additional_field_info table doesn't have any known conflicts with other themes or plugins. |
wp_xyz_em_additional_field_value | The wp_xyz_em_additional_field_value table doesn't have any known conflicts with other themes or plugins. |
wp_xyz_em_address_list_mapping | The wp_xyz_em_address_list_mapping table doesn't have any known conflicts with other themes or plugins. |
wp_xyz_em_attachment | The wp_xyz_em_attachment table doesn't have any known conflicts with other themes or plugins. |
wp_xyz_em_email_address | The wp_xyz_em_email_address table doesn't have any known conflicts with other themes or plugins. |
wp_xyz_em_email_campaign | The wp_xyz_em_email_campaign table doesn't have any known conflicts with other themes or plugins. |
wp_xyz_em_email_template | The wp_xyz_em_email_template table doesn't have any known conflicts with other themes or plugins. |
wp_xyz_em_sender_email_address | The wp_xyz_em_sender_email_address table doesn't have any known conflicts with other themes or plugins. |
Table name | Status |
---|
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 Newsletter Manager?
Option Name | Known Conflicts | |
---|---|---|
xyz_credit_link | Potential conflict with 17 plugins or themes | |
nlm_installed_date | The nlm_installed_date option doesn't have any known conflicts with other themes or plugins. | |
xyz_em_active | The xyz_em_active option doesn't have any known conflicts with other themes or plugins. | |
xyz_em_afterSubscription | The xyz_em_afterSubscription option doesn't have any known conflicts with other themes or plugins. | |
xyz_em_captcha | The xyz_em_captcha option doesn't have any known conflicts with other themes or plugins. | |
xyz_em_credit_dismiss | The xyz_em_credit_dismiss option doesn't have any known conflicts with other themes or plugins. | |
xyz_em_CronEndTime | The xyz_em_CronEndTime option doesn't have any known conflicts with other themes or plugins. | |
xyz_em_cronStartTime | The xyz_em_cronStartTime option doesn't have any known conflicts with other themes or plugins. | |
xyz_em_defaultEditor | The xyz_em_defaultEditor option doesn't have any known conflicts with other themes or plugins. | |
xyz_em_dse | The xyz_em_dse option doesn't have any known conflicts with other themes or plugins. | |
xyz_em_dsn | The xyz_em_dsn option doesn't have any known conflicts with other themes or plugins. | |
xyz_em_dss | The xyz_em_dss option doesn't have any known conflicts with other themes or plugins. | |
xyz_em_emailConfirmation | The xyz_em_emailConfirmation option doesn't have any known conflicts with other themes or plugins. | |
xyz_em_enableUnsubNotification | The xyz_em_enableUnsubNotification option doesn't have any known conflicts with other themes or plugins. | |
xyz_em_enableWelcomeEmail | The xyz_em_enableWelcomeEmail option doesn't have any known conflicts with other themes or plugins. | |
xyz_em_hesl | The xyz_em_hesl option doesn't have any known conflicts with other themes or plugins. | |
xyz_em_hidepmAds | The xyz_em_hidepmAds option doesn't have any known conflicts with other themes or plugins. | |
xyz_em_hourly_email_sent_count | The xyz_em_hourly_email_sent_count option doesn't have any known conflicts with other themes or plugins. | |
xyz_em_hourly_reset_time | The xyz_em_hourly_reset_time option doesn't have any known conflicts with other themes or plugins. | |
xyz_em_limit | The xyz_em_limit option doesn't have any known conflicts with other themes or plugins. | |
xyz_em_recaptcha_private_key | The xyz_em_recaptcha_private_key option doesn't have any known conflicts with other themes or plugins. | |
xyz_em_recaptcha_public_key | The xyz_em_recaptcha_public_key option doesn't have any known conflicts with other themes or plugins. | |
xyz_em_redirectAfterLink | The xyz_em_redirectAfterLink option doesn't have any known conflicts with other themes or plugins. | |
xyz_em_sendViaSmtp | The xyz_em_sendViaSmtp option doesn't have any known conflicts with other themes or plugins. | |
xyz_em_SmtpDebug | The xyz_em_SmtpDebug option doesn't have any known conflicts with other themes or plugins. | |
xyz_em_sub_copyto_admin | The xyz_em_sub_copyto_admin option doesn't have any known conflicts with other themes or plugins. | |
xyz_em_sub_screenshot_mail | The xyz_em_sub_screenshot_mail option doesn't have any known conflicts with other themes or plugins. | |
xyz_em_sub_screenshot_mail_attachements | The xyz_em_sub_screenshot_mail_attachements option doesn't have any known conflicts with other themes or plugins. | |
xyz_em_tinymce_filter | The xyz_em_tinymce_filter option doesn't have any known conflicts with other themes or plugins. | |
xyz_em_unsubscribe_copy_to_admin | The xyz_em_unsubscribe_copy_to_admin option doesn't have any known conflicts with other themes or plugins. | |
xyz_em_widgetName | The xyz_em_widgetName option doesn't have any known conflicts with other themes or plugins. | |
During use Newsletter Manager 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.
- recently_activated
- xyz_credit_link
- xyz_em_active
- xyz_em_sub_copyto_admin
- xyz_em_sub_screenshot_mail
- xyz_em_sub_screenshot_mail_attachements
- xyz_em_tinymce_filter
- xyz_em_unsubscribe_copy_to_admin
What new PHP functions does Newsletter Manager declare when it is active?
Using Newsletter Manager 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 Newsletter Manager from the command line with WP-CLI
Navigate to the root of your WordPress installation and type the following command:
How to activate Newsletter Manager from the command line with WP-CLI
To immediately activate Newsletter Manager after WP-CLI downloads the latest version you can use the following command:
How to reinstall Newsletter Manager from the command line with WP-CLI
To force a reinstallation of Newsletter Manager which overwrites the current plugin without asking for confirmation you can use the following command:
How to update Newsletter Manager to the latest version from the command line with WP-CLI
How to delete Newsletter Manager from the command line with WP-CLI
Where can you download earlier versions of Newsletter Manager?
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 Newsletter Manager 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 Newsletter Manager
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 Newsletter Manager. Different versions of WordPress could implement the features of this plugin in slightly different ways as well.