| #1 | SureMail – SMTP and Email Logs Plugin with Amazon SES, Postmark, and Other Providers | 80 | 45 | 65 | 200k+ | | | Non-prefixed hook name |
| #2 | Bit SMTP – Easy SMTP Solution with Email Logs | 96 | 6 | 13 | 2k+ | | | Missing Version |
| #3 | SMTP for Contact Form 7 | 99 | 5 | 0 | 1k+ | | | Missing direct file access protection |
| #4 | Check & Log Email – Easy Email Testing & Mail logging | 95 | 3 | 11 | 100k+ | | | Non-prefixed constant |
| #5 | Configure SMTP | 99 | 2 | 1 | 6k+ | | | Discouraged text-domain loading |
| #6 | Easy WP SMTP – WordPress SMTP and Email Logs: Gmail, Office 365, Outlook, Custom SMTP, and more | 15 | 32 | 163 | 500k+ | | | Direct Query |
| #7 | FluentSMTP – WP SMTP Plugin with Amazon SES, SendGrid, MailGun, Postmark, Google and Any SMTP Provider | 29 | 74 | 78 | 600k+ | | | Missing Translators Comment |
| #8 | Gmail SMTP | 37 | 84 | 73 | 10k+ | | | Unsafe printing function |
| #9 | GoSMTP – SMTP for WordPress | 39 | 59 | 42 | 500k+ | | | Output is not escaped |
| #10 | Icegram Mailer – Reliable Email Deliverability, No-code SMTP Replacement & Email logs | 37 | 37 | 102 | 1k+ | | | Non-prefixed global variable |
| #11 | WPO365 | Mail Integration for Office 365 / Outlook | 40 | 59 | 27 | 2k+ | | | Output is not escaped |
| #12 | MailerSend – Official SMTP Integration | 40 | 39 | 25 | 2k+ | | | Unsafe printing function |
| #13 | Mailgun for WordPress | 31 | 144 | 78 | 80k+ | | | Unsafe printing function |
| #14 | Contact Form & SMTP Plugin for WordPress by PirateForms | 93 | 14 | 102 | 30k+ | | | Non-prefixed hook name |
| #15 | Post SMTP – Complete Email Deliverability and SMTP Solution with Email Logs, Alerts, Backup SMTP & Mobile App | 22 | 1,581 | 2,326 | 300k+ | | | Non-prefixed global variable |
| #16 | ActiveCampaign Postmark for WordPress | 36 | 47 | 75 | 50k+ | | | Text Domain Mismatch |
| #17 | SAR Friendly SMTP | 98 | 2 | 11 | 2k+ | | | Non-prefixed function |
| #18 | Send Emails with Mandrill | 50 | 36 | 141 | 6k+ | | | Non-prefixed global variable |
| #19 | Simple SMTP | 97 | 3 | 10 | 2k+ | | | Non-prefixed hook name |
| #20 | Site Mailer – SMTP Replacement, Email API Deliverability & Email Log | 74 | 8 | 23 | 200k+ | | | Output is not escaped |
| #21 | SmartSMTP | 72 | 7 | 37 | 2k+ | | | Nonce verification recommended |
| #22 | SMTP for Amazon SES – YaySMTP | 30 | 197 | 122 | 3k+ | | | Exception output is not escaped |
| #23 | SMTP Mailer | 42 | 51 | 49 | 70k+ | | | Unsafe printing function |
| #24 | Yandex Mail SMTP Server for WordPress | 78 | 16 | 5 | 2k+ | | | Text Domain Mismatch |
| #25 | SMTP2GO for WordPress – Email Made Easy | 33 | 186 | 111 | 30k+ | | | Output is not escaped |
| #26 | Swift SMTP (formerly Welcome Email Editor) | 51 | 12 | 62 | 7k+ | | | Missing nonce verification |
| #27 | WP Mail Logging | 34 | 76 | 258 | 300k+ | | | Nonce verification recommended |
| #28 | WP Mail SMTP by WPForms – The Most Popular SMTP and Email Log Plugin | 36 | 18 | 146 | 4m+ | | | Direct Query |
| #29 | WP SendGrid SMTP | 39 | 99 | 50 | 1k+ | | | Text Domain Mismatch |
| #30 | WP Offload SES Lite | 96 | 541 | 5 | 10k+ | | | Text Domain Mismatch |
| #31 | Solid Mail – SMTP email and logging made by SolidWP | 68 | 16 | 17 | 60k+ | | | Database parameter is not escaped |
| #32 | WPO365 | MICROSOFT 365 GRAPH MAILER | 37 | 112 | 83 | 10k+ | | | Text Domain Mismatch |
| #33 | YaySMTP – WP Mail SMTP with Email Logs, Tracking & Reports | 22 | 654 | 435 | 10k+ | | | Exception output is not escaped |