| #1 | Configure SMTP | 99 | 2 | 1 | 6k+ | | Missing Arg Domain |
| #2 | WP Offload SES Lite | 96 | 541 | 5 | 10k+ | | Text Domain Mismatch |
| #3 | Check & Log Email – Easy Email Testing & Mail logging | 95 | 3 | 11 | 100k+ | | Non Prefixed Constant Found |
| #4 | Contact Form & SMTP Plugin for WordPress by PirateForms | 93 | 14 | 102 | 30k+ | | Non Prefixed Hookname Found |
| #5 | SureMail – SMTP and Email Logs Plugin with Amazon SES, Postmark, and Other Providers | 79 | 46 | 65 | 200k+ | | Non Prefixed Hookname Found |
| #6 | Site Mailer – SMTP Replacement, Email API Deliverability & Email Log | 74 | 8 | 23 | 200k+ | | Output Not Escaped |
| #7 | Solid Mail – SMTP email and logging made by SolidWP | 68 | 16 | 17 | 60k+ | | Exception Not Escaped |
| #8 | Swift SMTP (formerly Welcome Email Editor) | 51 | 12 | 62 | 7k+ | | Missing |
| #9 | Send Emails with Mandrill | 50 | 36 | 141 | 6k+ | | Non Prefixed Variable Found |
| #10 | SMTP Mailer | 42 | 51 | 49 | 70k+ | | Unsafe Printing Function |
| #11 | GoSMTP – SMTP for WordPress | 39 | 59 | 42 | 500k+ | | Output Not Escaped |
| #12 | Gmail SMTP | 37 | 84 | 73 | 10k+ | | Unsafe Printing Function |
| #13 | WPO365 | MICROSOFT 365 GRAPH MAILER | 37 | 112 | 83 | 10k+ | | Text Domain Mismatch |
| #14 | ActiveCampaign Postmark for WordPress | 36 | 47 | 75 | 50k+ | | Text Domain Mismatch |
| #15 | WP Mail SMTP by WPForms – The Most Popular SMTP and Email Log Plugin | 36 | 18 | 146 | 4m+ | | Direct Query |
| #16 | WP Mail Logging | 34 | 76 | 258 | 300k+ | | Recommended |
| #17 | SMTP2GO for WordPress – Email Made Easy | 33 | 186 | 111 | 30k+ | | Output Not Escaped |
| #18 | Mailgun for WordPress | 31 | 144 | 78 | 80k+ | | Unsafe Printing Function |
| #19 | SMTP for Amazon SES – YaySMTP | 30 | 197 | 122 | 3k+ | | Exception Not Escaped |
| #20 | FluentSMTP – WP SMTP Plugin with Amazon SES, SendGrid, MailGun, Postmark, Google and Any SMTP Provider | 29 | 74 | 78 | 600k+ | | Missing Translators Comment |
| #21 | Post SMTP – Complete Email Deliverability and SMTP Solution with Email Logs, Alerts, Backup SMTP & Mobile App | 22 | 1,581 | 2,326 | 300k+ | | Non Prefixed Variable Found |
| #22 | YaySMTP – WP Mail SMTP with Email Logs, Tracking & Reports | 22 | 654 | 435 | 10k+ | | Exception Not Escaped |
| #23 | Easy WP SMTP – WordPress SMTP and Email Logs: Gmail, Office 365, Outlook, Custom SMTP, and more | 15 | 32 | 163 | 500k+ | | Direct Query |
