Tanichev Email Deliverability Tester

Description

Your site sends the emails customers wait for: password resets, contact form replies, order confirmations. If those land in spam, nobody complains. People just stop getting them, and you lose orders and sign-ups without knowing why.

This plugin sends a test email from your site the same way the site sends all its mail, then shows where it landed and what to fix.

What you get

• Where your email lands. Inbox, Spam or Promotions at Gmail, Outlook, Yahoo and other big providers.
• A score and a plan. A score out of 100 and a short list of fixes in plain language, with the exact DNS records to copy. The DNS check also works before you send anything.
• Your real emails, tested. Password reset, new user, comment moderation and, with WooCommerce, the order emails. They are filled with a made-up customer and a reset link that resets nothing, so no customer’s data is in the test. You can also paste your own email, such as a newsletter.
• Proof that a fix worked. Every test stays in the history, with the score over time and what changed since the last one.
• A watch on your mail (optional). Each new kind of email your site sends gets checked, and the Monitoring page and the dashboard widget show an alert when, say, WooCommerce emails start failing authentication.

Works with how your site already sends

This is not an SMTP plugin and changes nothing in your mail setup. It tests what you use now, whether that is the server’s own mail or WP Mail SMTP, FluentSMTP, Post SMTP or another SMTP plugin, and its advice takes that into account.

Behind the report are the checks receivers run: SPF, DKIM, DMARC, the sending server, blocklists, spam filters and the Gmail and Yahoo sender rules. You also get Site Health checks, a dashboard widget and a WP-CLI command (wp deliverability-tester test).

Free to use right now, with daily limits per site that you can see under Settings; when the day’s folder checks are used up, a test runs without one. There is no account to create and no API key to enter.

External services

The plugin works with Email Spam Tester, an email testing service run by the plugin’s author. Nothing is sent until an administrator presses “Connect this site”. After that:

• Connecting sends the WordPress and plugin versions, the number of sites and, if you enter one, a contact email. The site is registered under an id that does not reveal its address; the site’s name and address reach the service inside the test emails.
• Each test sends the test email, plus about 30 copies when the folder check is on. At Gmail these copies go to public test mailboxes run by another company, named in the privacy policy, where anyone can see the subject, the sender name and the folder.
• With each test go the sending domain, the From and Return-Path addresses, the administrator’s language, how WordPress sends (mail() or SMTP, the SMTP host and plugin name, never a password) and the mail server’s answer if it refused the email, with addresses removed.
• The DNS check on the Test page sends the domain, the SMTP host and, if the administrator’s email is on the same domain, that address, proposed as the DMARC report address.
• Monitoring, only if you switch it on, sends the sender and subject of each email the site sends; a copy of the first email of each new kind, with the recipients’ domains and the plugin that sent it; and for emails that failed to send, their number, the plugin and the server’s answer. Copies are deleted after two days, their reports after 90 days, and those reports are private to the site.

Anyone with the link can open a test report. See the terms and the privacy policy.