Techzapp Mailer
Production-grade bulk mailer for WordPress built directly on the AWS SES v2 API (native SigV4, no AWS SDK). Includes CSV import, HTML campaign composer, throttled cron queue worker, SNS bounce/complaint webhook, RFC 8058 one-click unsubscribe and a hard 2.0% bounce-rate circuit breaker.
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Install
The author publishes release zips, so WP-CLI can install straight from GitHub:
wp plugin install https://github.com/appcoderikbal/plugin-crm/releases/download/v1.0.4/tz-mailer.zipDeclares an update source (https://github.com/appcoderikbal/plugin-crm), so updates arrive through the plugin's own updater.
From the readme
Techzapp Mailer
Production-grade WordPress bulk mailer built directly on the AWS SES v2 API
with native Signature Version 4 signing — no AWS SDK, no Guzzle, no dependency
tree to collide with other plugins.
Its defining feature is a hard 2.0% bounce-rate circuit breaker that halts
all sending automatically before AWS puts your account under review.
Features
- CSV importer — local isemail() validation, case-insensitive dedupe
against the file and the database, automatic delimiter and BOM detection, and
a unique 128-bit unsubscribe token generated per contact.
- Campaign composer — the standard WordPress visual/HTML editor with
{name}, {email} and {unsubscribeurl} merge tags.
- Throttled queue worker — a configurable micro-batch every five minutes
with a deliberate pause between individual sends. Default ≈180 emails/hour.
- Circuit breaker — re-evaluated before every single message and again
whenever bounce data arrives over SNS. Requires an explicit manual
confirmation to clear.
- SNS webhook — records bounces, complaints and delivery confirmations,
auto-confirms its own topic subscription, and verifies Amazon's message
signature so the public endpoint cannot be
Read the full README on GitHub →