Post SMTP – Complete Email Deliverability and SMTP Solution with Email Logs, Alerts, Backup SMTP & Mobile App

Improve WordPress email deliverability. Connect Gmail SMTP, Microsoft 365, Brevo, SendGrid, Mailgun, Zoho, Amazon SES, etc. #1 WordPress SMTP Plugin.

v3.9.4Saad IqbalUpdated 2026-06-03Added Oct 15, 2017300k+ installs94% rating95% support resolved
22
Score
1,581
Errors
2,326
Warnings
+0
Change

Category Scores

Security0
Repo87
Performance92
Maintainability0

Top Issues by Category

maintainability2,018
security1,487
i18n198

Issues Details

3,907 issues found in latest scan

WARNING1,143
WordPress.NamingConventions.PrefixAllGlobals.NonPrefixedVariableFound

Global variables defined by a theme/plugin should start with the theme/plugin prefix. Found: "$PNG_TEMP_DIR".

ERROR952
WordPress.Security.EscapeOutput.OutputNotEscaped

All output should be run through an escaping function (see the Security sections in the WordPress Developer Handbooks), found '" <a href='{$skip_url}' class='button button-small button-secondary'>{$use_plugin_anonymously_text}</a>"'.

WARNING199
WordPress.NamingConventions.PrefixAllGlobals.NonPrefixedConstantFound

Global constants defined by a theme/plugin should start with the theme/plugin prefix. Found: &quot;FS_API__ADDRESS&quot;.

WARNING130
WordPress.Security.NonceVerification.Recommended

Processing form data without nonce verification.

WARNING126
WordPress.NamingConventions.PrefixAllGlobals.NonPrefixedFunctionFound

Functions declared in the global namespace by a theme/plugin should start with the theme/plugin prefix. Found: &quot;_fs_text&quot;.

WARNING117
WordPress.Security.ValidatedSanitizedInput.MissingUnslash

$_GET[&#039;_psnonce&#039;] not unslashed before sanitization. Use wp_unslash() or similar

WARNING104
WordPress.NamingConventions.PrefixAllGlobals.NonPrefixedClassFound

Classes declared by a theme/plugin should start with the theme/plugin prefix. Found: &quot;FS_Admin_Menu_Manager&quot;.

ERROR100
WordPress.Security.EscapeOutput.ExceptionNotEscaped

All output should be run through an escaping function (see the Security sections in the WordPress Developer Handbooks), found '" $this->_max"'.

WARNING97
WordPress.NamingConventions.PrefixAllGlobals.NonPrefixedHooknameFound

Hook names invoked by a theme/plugin should start with the theme/plugin prefix. Found: &quot;active_plugins&quot;.

ERROR96
missing_direct_file_access_protection

PHP file should prevent direct access. Add a check like: if ( ! defined( 'ABSPATH' ) ) exit;

ERROR92
WordPress.WP.I18n.MissingTranslatorsComment

A function call to __() with texts containing placeholders was found, but was not accompanied by a "translators:" comment on the line above to clarify the meaning of the placeholders.

WARNING64
WordPress.PHP.DevelopmentFunctions.error_log_trigger_error

trigger_error() found. Debug code should not normally be used in production.

ERROR63
WordPress.Security.EscapeOutput.UnsafePrintingFunction

All output should be run through an escaping function (like esc_html_e() or esc_attr_e()), found '_e'.

WARNING60
WordPress.PHP.DevelopmentFunctions.error_log_print_r

print_r() found. Debug code should not normally be used in production.

WARNING53
WordPress.Security.ValidatedSanitizedInput.InputNotValidated

Detected usage of a possibly undefined superglobal array index: $_GET[&#039;access_token&#039;]. Check that the array index exists before using it.

WARNING52
WordPress.Security.ValidatedSanitizedInput.InputNotSanitized

Detected usage of a non-sanitized input variable: $_GET[&#039;_psnonce&#039;]

ERROR43
WordPress.WP.I18n.TextDomainMismatch

Mismatched text domain. Expected 'post-smtp' but got 'maileroo'.

ERROR35
WordPress.WP.I18n.MissingArgDomain

Missing $domain parameter in function call to __().

WARNING34
WordPress.WP.EnqueuedResourceParameters.NotInFooter

In footer ($in_footer) is not set explicitly wp_enqueue_script; It is recommended to load scripts in the footer. Please set this value to `true` to load it in the footer, or explicitly `false` if it should be loaded in the header.

WARNING29
WordPress.DB.DirectDatabaseQuery.DirectQuery

Use of a direct database call is discouraged.

ERROR28
WordPress.WP.I18n.NonSingularStringLiteralText

The $text parameter must be a single text string literal. Found: $host

WARNING26
WordPress.DB.DirectDatabaseQuery.NoCaching

Direct database call without caching detected. Consider using wp_cache_get() / wp_cache_set() or wp_cache_delete().

ERROR24
WordPress.WP.AlternativeFunctions.file_system_operations_fclose

File operations should use WP_Filesystem methods instead of direct PHP filesystem calls. Found: fclose().

WARNING20
WordPress.Security.SafeRedirect.wp_redirect_wp_redirect

wp_redirect() found. Using wp_safe_redirect(), along with the &quot;allowed_redirect_hosts&quot; filter if needed, can help avoid any chances of malicious redirects within code. It is also important to remember to call exit() after a redirect so that no other unwanted code is executed.

ERROR16
WordPress.DateTime.RestrictedFunctions.date_date

date() is affected by runtime timezone changes which can cause date/time to be incorrectly displayed. Use gmdate() instead.

Latest Snapshot

Findings

3,907

Errors

1,581

Warnings

2,326

Score History

First score snapshot

First scan completed Jun 19, 2026

v3.9.4 · Plugin Check 2.0.0 · Model 2026.06-mvp-static-v2

Jun 19, 2026

v3.9.4

22

Latest

Findings
3,907
Errors
1,581
Warnings
2,326
Plugin Check
2.0.0
Model
2026.06-mvp-static-v2

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