codecasastudios

CodeCasaStudiosLtd

Casa Mail is an end-to-end email platform for WordPress sites. It intercepts every <code>wp_mail()</code> call and delivers it through the Casa Mail gateway operated by CodeCasa Studios on the OnlineStoreNotifications infrastructure (api.onlinestorenotifications.com). On top of reliable transactional delivery it adds a full marketing platform, branded webmail mailboxes, and one-click sender-domain authentication, all driven from the WordPress admin.
If your site doesn’t send mail reliably today, Casa Mail is the simplest way to start. If you’re already paying for an SMTP plugin plus a separate marketing tool plus a separate webmail provider, Casa Mail consolidates the three so you can run customer email, broadcasts, and inbox replies from one place.
<h4>What you get</h4>
Transactional email (every plan, including Free)
<ul>
<li>Every <code>wp_mail()</code> is routed through the Casa Mail gateway with DKIM, SPF, and aligned Return-Path on <code>onlinestorenotifications.com</code> (or your own domain after one-click authentication).</li>
<li>Durable retry outbox: if the gateway is briefly unreachable, the payload is persisted and retried automatically with 30s, 2m, 10m backoff. <code>wp_mail()</code> never blocks, never loses a message, never returns false to the caller.</li>
<li>Per-tenant inbox at <code><your-site>@onlinestorenotifications.com</code>. Replies to your customer emails come back to that inbox; on the Free tier they auto-forward to your contact address. On webmail-enabled plans you can also receive replies on your own domain (e.g. <code><your-inbox>@yourdomain.com</code>).</li>
<li>Paginated send log on the Logs page with up to 30 days of history retained (hard-capped at 2,000 rows per WordPress install). The Dashboard surfaces the most recent activity at a glance.</li>
<li>Optional default-From override so every site email uses one consistent sender.</li>
</ul>
Sender domain authentication (every plan)
<ul>
<li>Add your own domain in the admin and the plugin prints three DNS records (DKIM, SPF, Return-Path).</li>
<li>One-click “Check my domain” verifier. Once verified, customer emails go from <code><your-inbox>@yourdomain.com</code> so Gmail and Outlook show your brand in the From, not “via onlinestorenotifications.com”.</li>
<li>Inline plain-English helpers for Cloudflare, GoDaddy, Namecheap, and Google Domains. Cloudflare grey-cloud guidance for replies is built in.</li>
<li>Free plan can opt out of domain authentication entirely and send from the shared <code><your-inbox>@onlinestorenotifications.com</code> address with DKIM/SPF/Return-Path already configured on the gateway.</li>
</ul>
Marketing Studio (Growth and higher)
<ul>
<li>Contacts: add manually, import from CSV, or one-click sync your WooCommerce customer base.</li>
<li>Segments: saved queries (all contacts, contacts with a specific tag) with a sample-preview before you send.</li>
<li>Campaigns: schedule a broadcast to a segment, watch send progress on a per-campaign report (sent, opens, unique-by-contact open + click rate).</li>
<li>Composer: full block-based visual editor with heading / paragraph / image / button / divider / spacer / two-columns / raw-HTML blocks, per-block and global style settings, Visual / Source HTML / Wrapper / Preview tabs, desktop + mobile preview, 50-step undo/redo, emoji picker, drag-and-drop images into the WordPress media library, per-tenant saved templates.</li>
<li>Personalization tokens: <code>[FIRST_NAME]</code>, <code>[LAST_NAME]</code>, <code>[FULL_NAME]</code>, <code>[EMAIL]</code>, <code>[UNSUBSCRIBE_URL]</code>.</li>
<li>Suppressions: paginated list with bounce / complaint / unsubscribe filters, manual add, CSV export. Bounces and FBL complaints are fanned out from the gateway automatically so you never have to clean a list by hand.</li>
</ul>
Casa Webmail mailboxes (Growth and higher)
<ul>
<li>Self-hosted branded webmail at <code>webmail.onlinestorenotifications.com</code>. Sign in with <code><your-inbox>@onlinestorenotifications.com</code> from any browser and read and reply to customer replies from a clean inbox.</li>
<li>Use your own domain too: point your domain’s MX records at <code>mx.sendemailtoday.io</code> and replies to <code><your-inbox>@yourdomain.com</code> land in the same webmail UI, signed by the platform DKIM.</li>
<li>Real Maildir storage on the Casa Mail backbone. No third-party Gmail forwarding.</li>
</ul>
Billing and plan management
<ul>
<li>One-click upgrade from Free to Starter, Growth, Business, or Agency. Stripe Checkout opens in a new tab; the plugin never sees your card details.</li>
<li>Paid plans are also available straight from the onboarding wizard, so you can start on the right tier from day one.</li>
<li>In-WordPress quota-usage display with an “approaching cap” banner so a busy month doesn’t surprise you mid-send.</li>
<li>Stripe-hosted billing portal for change-card, change-plan, view-invoices, cancel.</li>
</ul>
Built-in trust and safety
<ul>
<li>Sender-domain enforcement so a misconfigured WordPress install can never send under someone else’s domain by accident.</li>
<li>Gateway-side content review on marketing broadcasts: a separate moderation layer scans campaigns and pauses anything that looks like phishing, brand impersonation, or credential harvesting before it reaches your recipients. The gateway operator reviews flagged content and contacts you with the reason. This protects your sender reputation.</li>
</ul>
<h4>Pricing</h4>
<ul>
<li>Free: 10,000 transactional emails per month, full quota from day one (no daily ramp), 500/day soft cap. Custom-domain authentication included. No credit card required.</li>
<li>Starter (GBP 9/month): 25,000 emails per month, 2,500/day cap. Custom-domain authentication.</li>
<li>Growth (GBP 29/month): 100,000 emails per month, Marketing Studio (contacts, segments, campaigns, visual editor, suppressions), 1 branded Casa Webmail mailbox.</li>
<li>Business (GBP 79/month): 500,000 emails per month, Marketing Studio, 5 mailboxes.</li>
<li>Agency (GBP 199/month): 2,000,000 emails per month, Marketing Studio, 25 mailboxes.</li>
</ul>
Upgrades and downgrades are entirely self-serve from Settings -> Casa Mail -> Billing. Cancellation is one click from the Stripe-hosted portal; you keep service through the end of your billing cycle.
<h4>How it works (transactional path)</h4>
<ul>
<li><code>pre_wp_mail</code> is hooked at priority 1. Each call is converted to a JSON payload and POSTed to the gateway.</li>
<li>If the gateway accepts on the first POST, <code>wp_mail()</code> returns true and the message is durably enqueued upstream.</li>
<li>If the gateway is unreachable on the first POST, the payload is written to a durable outbox table (<code><prefix>casamail_outbox</code>) and a cron tick retries with 30s, 2m, 10m backoff.</li>
<li>A separate transmit log table (<code><prefix>casamail_sends</code>) records every attempt for visibility on the plugin dashboard. Rows older than 30 days are pruned automatically.</li>
</ul>
<h4>Onboarding</h4>
After activation, an in-WordPress wizard collects:
<ol>
<li>Site name, site URL, contact email address.</li>
<li>A 6-digit code emailed by the gateway to confirm the address.</li>
<li>The handle to use for your inbox (defaults to a friendly version of your site URL, e.g. <code>acmestore</code>).</li>
<li>Plan selection. Five tiers shown side-by-side (Free, Starter, Growth, Business, Agency); pick Free to get started immediately, or pick a paid tier to launch Stripe Checkout in a new tab. Either way your tenant is already provisioned so you can keep onboarding while you complete payment.</li>
<li>Where customer emails should come from: the shared Casa Mail address, or your own authenticated domain (with one-click DNS verification).</li>
</ol>
The whole onboarding is one screen with five short steps. No SMTP keys to copy, no DNS console to leave WordPress for.
<h4>Trademark note</h4>
This plugin is not affiliated with or endorsed by WooCommerce, Automattic, or any third party. The WooCommerce name appears only as a compatibility note (when WooCommerce is detected, the plugin’s admin menu attaches under it for convenience; otherwise it lands under Settings).
<h3>External services</h3>
This plugin transmits data to a third-party SMTP gateway. WordPress.org policy requires this be disclosed.
<h4>Endpoints contacted</h4>
The plugin makes HTTPS requests to:
<ul>
<li><code>https://api.onlinestorenotifications.com/v1/onboard/request</code> – during onboarding, to send your verification email.</li>
<li><code>https://api.onlinestorenotifications.com/v1/onboard/verify</code> – during onboarding, to confirm the code and provision an account.</li>
<li><code>https://api.onlinestorenotifications.com/v1/send</code> – for every <code>wp_mail()</code> call once the plugin is onboarded.</li>
<li><code>https://api.onlinestorenotifications.com/v1/email/domain</code> (GET / add / verify) – when the site administrator interacts with the Sender Domain page.</li>
<li><code>https://api.onlinestorenotifications.com/v1/billing/*</code> – checkout, billing portal, plan status. Only invoked when the site administrator interacts with the Billing page or picks a paid tier during onboarding.</li>
</ul>
The gateway is operated by CodeCasa Studios under the Casa Mail brand and runs on the OnlineStoreNotifications infrastructure. Casa Mail and OnlineStoreNotifications are sister brands of the same company; the API hostname reflects the shared backbone rather than a third-party dependency.
<h4>Data sent</h4>
During onboarding (one-time, before any send): site administrator email address, site name, site URL.
For each <code>wp_mail()</code> call once onboarded: sender email address, sender name, recipient email address(es), subject, message body, message headers (after stripping <code>From</code>/<code>To</code>/<code>Subject</code>/<code>Date</code>/<code>Message-ID</code>/<code>MIME-Version</code>/<code>Content-Type</code>/<code>Content-Transfer-Encoding</code>).
<h4>Terms and privacy</h4>
<ul>
<li>Terms of service: https://sendemailtoday.io/terms.html</li>
<li>Privacy policy: https://sendemailtoday.io/privacy.html</li>
</ul>
<h3>Privacy</h3>
When activated, this plugin transmits email content (recipient, sender, subject, body, headers) to a third-party SMTP gateway for delivery. This is the plugin’s only purpose. The data lifecycle is described above under “External services” and on the linked privacy policy.
The plugin also writes a <code>wp_add_privacy_policy_content()</code> block describing what is transmitted; this lets site administrators include the disclosure in the WordPress-managed privacy policy page (Settings -> Privacy).
Account deletion: a “Request account deletion” button on the plugin’s Settings page emails the gateway operator. Upon confirmation, the tenant record, API key(s), domain-authentication records, and recent sending history are removed from the gateway side. The plugin uninstall additionally removes the plugin’s WordPress-side options + tables.

Casa Mail

A complete email platform for WordPress: transactional SMTP, marketing campaigns, branded mailboxes, and DKIM-aligned sending from your own domain.

Nicolas Verlhiac

<h3>Add Mail SMTP settings for WordPress</h3>
Looking to modify the SMTP on your WordPress site? 
Our Custom SMTP solution offers you this possibility, allowing you to easily change your WordPress SMTP settings, ensuring your emails consistently land in the recipient’s inbox.
Custom SMTP solves your email deliverability problems by reconfiguring WordPress to use a proper SMTP provider when sending emails.
What’s more, our intuitive settings page and comprehensive documentation will guide you through the process, making the task of modifying your SMTP settings easier than ever.
Custom SMTP is a free tool, packed with all the essential features you need to send your WordPress emails with absolute confidence!
Built for modern WordPress: WordPress 7.0 ready, PHPMailer 7.0.2 compatible, stateless / cloud-ready (Docker, Kubernetes), and fully translated in English and French.
<h3>Amazon SES API — keyless sending with IAM roles</h3>
Running WordPress on AWS (ECS Fargate, EC2, App Runner)? Custom SMTP can send through the Amazon SES API authenticated entirely by your container or instance IAM role — with no access keys, no secret keys, and no SMTP credentials stored anywhere. The plugin relies on the AWS default credential chain (the ECS task role / EC2 instance role), so your secrets never live in the database or the settings page.
This is the cleanest, most secure way to send from a containerized, 12-factor WordPress:
<ul>
<li>Zero stored secrets — authentication comes from the IAM role attached to the task/instance, not from keys pasted into wp-admin.</li>
<li>Full message fidelity — HTML, attachments, CC/BCC, Reply-To and custom headers are preserved (the message is sent as raw MIME); BCC recipients stay hidden.</li>
<li>SES Configuration Sets — optional, for bounce/complaint tracking and CloudWatch metrics.</li>
<li>Environment-driven — region, sender address and configuration set can be injected as environment variables / PHP constants (<code>SES_REGION</code> / <code>AWS_REGION</code>, <code>SES_FROM_EMAIL</code>, <code>SES_CONFIG_SET</code>), so the same image ships across environments without touching the database.</li>
<li>No extra dependency required — works whether or not the AWS SDK for PHP is present; when it isn’t, a built-in, dependency-free signed API client is used.</li>
<li>One-click test — send a test email and get back the SES MessageId.</li>
</ul>
<h3>Config-as-code & Multisite (immutable deployments)</h3>
For immutable Docker images, <code>DISALLOW_FILE_MODS</code> setups and large networks, every setting can be forced from the environment — no database writes at deploy time:
<ul>
<li>Any setting via a constant or env variable — define <code>CUSTOM_SMTP_<SETTING></code> (e.g. <code>CUSTOM_SMTP_MAILER_TYPE=ses_api</code>, <code>CUSTOM_SMTP_HOST</code>, <code>CUSTOM_SMTP_LOG_RETENTION</code>) and it overrides the saved value everywhere. The Amazon SES shortcuts (<code>SES_REGION</code> / <code>AWS_REGION</code>, <code>SES_FROM_EMAIL</code>, <code>SES_CONFIG_SET</code>) keep working too.</li>
<li>Activate a mailer network-wide with one variable — set <code>CUSTOM_SMTP_MAILER_TYPE=ses_api</code> in the container and every site uses Amazon SES, with zero per-site configuration and no custom <code>option_*</code> filter.</li>
<li>Multisite network settings — on a network, settings are read from the network-wide option (<code>get_site_option</code>) beneath any per-site option, so one configuration can apply to the whole network.</li>
<li>Visible in wp-admin — any field supplied by the environment is shown read-only with a “from <code>VARIABLE</code>” badge, so admins see exactly what the platform controls.</li>
</ul>
<h3>Built-in Email Logging</h3>
Never wonder if your emails were sent again. Custom SMTP automatically logs every email sent from your WordPress site – including WooCommerce order notifications, contact form submissions, and password resets. Preview email content directly in wp-admin, debug delivery issues with detailed error messages, and export logs for compliance.
<h3>Configuration Options</h3>
You can set the following options:
<ul>
<li>From Name & Email – Specify the sender name and email address for all outgoing emails</li>
<li>SMTP Host – Your email provider’s server (e.g., smtp.gmail.com)</li>
<li>SMTP Port – Common ports: 587 (TLS), 465 (SSL), 25 (None)</li>
<li>Encryption – Choose between None, SSL, or TLS</li>
<li>Authentication – Enable/disable SMTP authentication for relay servers</li>
<li>Username & Password – Your SMTP credentials (password stored encrypted)</li>
<li>Provider Presets – One-click configuration for Gmail, Outlook, iCloud, SendGrid, AWS SES, and more</li>
<li>Amazon SES API (IAM role) – Send through the Amazon SES API with no stored credentials, authenticated by your AWS task/instance role</li>
</ul>
<h3>Key Features</h3>
SMTP Configuration 
* Configure any SMTP server (Gmail, Outlook, SendGrid, Mailgun, AWS SES, etc.) 
* Support for SSL/TLS encryption 
* Optional SMTP authentication for relay servers 
* Test connection without sending emails 
* Send test emails to verify configuration
Amazon SES API (keyless, IAM role) 
* Send via the Amazon SESv2 API authenticated by your AWS IAM role — no access keys or SMTP credentials stored 
* Ideal for AWS ECS/Fargate, EC2 and other containerized, stateless deployments 
* Preserves HTML, attachments, CC/BCC, Reply-To and custom headers (raw MIME) 
* Optional SES Configuration Set for bounce/complaint/CloudWatch tracking 
* Region, sender and configuration set configurable via environment variables or constants 
* Works with or without the AWS SDK for PHP (built-in signed API client fallback) 
* “Send Test Email” returns the SES MessageId
Email Logging & Debugging 
* Zero configuration – Logging works out of the box 
* Track all emails sent from WordPress, WooCommerce, Contact Form 7, and any plugin 
* View delivery status (sent/failed) with detailed error messages 
* Debug wp_mail errors easily – See exactly why emails fail 
* Resend failed emails – Re-send a failed message straight from the logs after fixing your configuration 
* Store email headers for advanced troubleshooting 
* Search by recipient, subject, or status 
* Filter by date range (Today, 7 days, 30 days) 
* Export logs to CSV for reporting and compliance
Email Preview & Content 
* Preview email body directly from wp-admin – No need to send test emails 
* View HTML source code of any logged email 
* Outlook-style sidebar for quick preview 
* Download any email as HTML file for archiving 
* Optional content storage (disabled by default for privacy)
Deliverability 
* Cooperates with the automatic Envelope-From / Return-Path behavior introduced in WordPress 6.9 — improves SPF, DKIM and DMARC alignment on strict hosts (AWS SES, Postmark, etc.) 
* PHPMailer 7.0.2 compatible (the version bundled in WordPress 7.0) 
* UTF-8 and emoji handled end-to-end in subjects, bodies, and headers
Privacy & GDPR-friendly 
* SMTP password encrypted at rest (AES-256-CBC) 
* Configurable log retention with automatic purge (30 days by default) 
* Email content storage can be disabled in one click from the settings 
* Email preview rendered in a sandboxed iframe — no JavaScript execution from logged emails 
* All data stays in your WordPress database — no third-party calls
Security 
* SMTP password encrypted in database (AES-256-CBC) 
* All admin actions protected with nonces 
* Capability checks on all operations
Stateless & Cloud-Ready 
* Fully compatible with stateless WordPress hosting (containers, Kubernetes, AWS ECS/Fargate, etc.) 
* Works with Bedrock, Trellis, and other modern WordPress stacks 
* Zero filesystem writes – all data stored in the database 
* No shared storage (EFS/NFS) required between instances 
* Safe to run on read-only filesystems
AI & Workflow Integration (WordPress 6.9+) 
* <code>custom-smtp/connection-health</code> — read the current SMTP state (configured, host/port/encryption/auth, log retention) from any tool 
* <code>custom-smtp/send-test-email</code> — trigger a test email through your configured SMTP server 
* Compatible with MCP-enabled AI assistants, automation tools (n8n, Make), dashboards, and other plugins via the WordPress Abilities API 
* Protected by capability checks (<code>manage_options</code>) — same security boundary as the wp-admin interface

Custom SMTP: Email Deliverability – FREE & Easy-to-use

Effortlessly configure WordPress SMTP and monitor all sent emails. Built-in email logging with preview, error debugging, and WooCommerce support.

Casa Mail vs Custom SMTP: Email Deliverability – FREE & Easy-to-use