MailDoctor | SMTP, Mail Log & DNS Doctor for WordPress

MailDoctor | SMTP, Mail Log, DNS Doctor & Deliverability for WordPress

MailDoctor makes wp_mail() arrive. It routes every message WordPress sends through SMTP or an API provider, falls over to a second route when the first fails, keeps a log of every email you can search and resend, and diagnoses the DNS side with a doctor that writes the SPF, DKIM and DMARC records for you. Then it keeps watching: blocklists every day, bounces as they come in.

Key Features

• Primary and secondary routes: this server, SMTP, Brevo, Mailgun, Postmark, SendGrid or Amazon SES (SigV4), no SDKs
• Failover: when the primary route fails, the message goes through the secondary one and the log says so
• A separate route for marketing mail (MailFlow, anything with List-Unsubscribe) so campaigns never hurt your transactional sender
• Mail log: recipients, subject, headers, body, route, transport, status, provider message id, timing, DKIM state; search, filter, resend to anyone
• Test send with a report: route taken, time, DKIM, SPF and DMARC state
• DNS doctor: SPF, DKIM, DMARC, BIMI, MX and reverse DNS, each with a copy-ready record
• DKIM key generator (RSA-2048) with the TXT record, a live check and rotation; signs every message from the domain
• Blocklist monitor: 12 IP blocklists and 3 domain lists, checked daily with an email alert
• Background queue with a per-minute rate limit, retries with backoff, urgent mail sent directly
• Bounce and complaint webhooks for Brevo, Mailgun, Postmark, SendGrid and SES; MailFlow suppresses the addresses
• Branded core notices: plain-text WordPress mail wrapped in a template with your logo, colour and footer
• Failure alerts, a Site Health test, force-From and Return-Path controls

The DNS Doctor

1. Run it for your sending domain: six checks, each OK, Improve or Missing, with the reason
2. Copy the record it writes (type, host, value) into your DNS host
3. Generate a DKIM key on the DKIM tab if you send from this server; publish the TXT record and press Check
4. Send a test and read the report: route, timing, signed or not, SPF and DMARC

Webhooks

Each provider gets its own URL with a secret key. Bounces and complaints are recorded, shown on the Settings tab and announced through do_action('maildoctor_bounce'); MailFlow listens and suppresses the address.

Installation

1. Download the zip from your Library
2. In wp-admin go to Plugins › Add New › Upload Plugin, choose the zip and activate it
3. A new menu entry appears in the admin sidebar; open it
4. MailDoctor › Routing: choose the primary transport, save, press Send test
5. DNS doctor: publish the records it shows
6. Optional: a secondary route for failover, the queue, branded notices

Requirements

• WordPress 6.0 or newer (tested up to 7.0)
• PHP 8.0 or newer
• OpenSSL in PHP (for DKIM keys)
• WP-Cron or a system cron for the queue and the daily checks

What You Get

• MailDoctor 1.0.0 for WordPress (maildoctor-1.0.0.zip)
• Full, readable PHP and JavaScript source, no obfuscation
• Updates for the term of your licence

Works With

Replaces WP Mail SMTP-style plugins. Pairs with MailFlow for newsletters, and with: MailFlow, PushPress, AlphaLogin, LicenseGuard, MeetPress, FolderPress.

The screenshots show the plugin on our demo site with sample data.