Back In Stock Notifier for WooCommerce | WooCommerce Waitlist Pro vs Easy WP SMTP – WordPress SMTP and

Every out-of-stock product is a lost sale waiting to happen. Back In Stock Notifier for WooCommerce captures those visitors instead of losing them. It shows an email subscription form on out-of-stock products, then automatically emails every subscriber the moment the product is restocked. Try the Live Demo | Documentation & Support | Browse Add-ons Why store owners choose this plugin Built for scale. Restock emails are sent through a background process engine. Even with 10,000+ subscribers on a single product, notifications go out reliably. No server crashes, no timeouts, no duplicate emails that loop-based plugins suffer from. Works out of the box. Activate the plugin and the waitlist form appears on out-of-stock products immediately. No setup required. Native WooCommerce emails. The subscription confirmation and restock notification emails use the WooCommerce email system, so they match your store branding and are fully customizable under WooCommerce > Settings > Emails. Trusted by 20,000+ stores worldwide. Supported product types Simple and Variable products (product level and variation level) Grouped products Simple and Variable Subscriptions (WooCommerce Subscriptions) Product Bundles (WooCommerce Product Bundles) Core features Automatic restock emails sent through a reliable background process Email subscription form on out-of-stock products, for both guests and members Email address pre-filled for logged-in members Duplicate check per product, the same email is never added twice to a waitlist Customizable subject and message with placeholders like {product_name}, {product_link}, {cart_link} and more Customizable form labels, messages, and error texts Option to show the subscribe form for backorder products Fair Sending (First-Come-First-Served), on a limited restock notify only as many subscribers as units in stock, the rest stay on the waitlist for the next restock Email speed limit, send automatic emails gradually to respect hosting and SMTP provider limits Six subscribe form designs (Default, Card, Minimal, Compact, Bold, Outline) and six popup designs including five lightweight popups that need no extra library, all chosen from the settings page Auto Coupon, optionally send each subscriber a unique discount code that only works on the exact product or variation they waited for, with full control over discount type, amount, expiry, usage limit, minimum spend and sale item rules Product table placeholder for both emails, showing the subscribed product in a classic order style table with thumbnail, SKU, quantity and price Stock status filter on the subscribers list, including “in stock but below your notification threshold” to find subscribers the automatic sender skipped Auto-retry for stuck emails, an optional recovery task that resends notifications when a background job fails or never runs New subscriber indicator on the admin menu and subscribers list, showing how many people signed up since your last visit Bot protection with Google reCAPTCHA (v2/v3) and Cloudflare Turnstile Subscriber management dashboard to view, sort, filter, and delete subscribers Manual and bulk send instock mail actions Dashboard report widget with subscription and mail statistics Estimate Stock Arrival messages on the subscribe form Auto-delete old subscriber entries on a schedule GDPR-friendly privacy checkbox Third-party inventory management support (stock updated directly in the database) REST API to create, read, update, and delete subscribers Webhooks for subscription events Quantity field support Works with Elementor Translation ready Premium Add-ons Supercharge your waitlist with premium add-ons. Every purchase is a one-time payment with lifetime updates. No subscriptions, no recurring fees. You can browse and manage everything from your dashboard under Instock Notifier > Plugins & Add-ons. Best value: get Bundle Add-ons, all 15 add-ons plus every future add-on, for one discounted price. Bundle Add-ons – All 15 add-ons below plus any future add-ons, at one discounted price. Double Opt-In – Subscribers confirm by email before joining the waitlist. Keeps your list clean and compliant, and unconfirmed entries are auto-deleted after X days. Unsubscribe – Adds an unsubscribe link to emails, and members can manage their waitlists from My Account. Ban Emails – Block disposable email domains (mailinator and similar), public domains, and specific addresses to stop fake signups. Never Restock – Product discontinued? Point waiting subscribers to an alternative product and notify them when it becomes available, so no waitlist goes to waste. Mailchimp – Automatically sync waitlist subscribers to your Mailchimp audience in the background. Klaviyo – Sync subscribers to Klaviyo and trigger Klaviyo Flows for Back In Stock and Successful Subscription events, so you can build advanced automations and campaigns. ActiveCampaign – Sync subscribers to ActiveCampaign automatically. Twilio SMS – Send restock alerts by SMS in addition to email, so customers never miss a restock. Track Sales – See which subscribers purchased after receiving a restock email and measure the revenue your waitlist recovers. Export CSV – Export subscriber lists to CSV for records, newsletters, or promotions. Import CSV – Import subscribers from a CSV file when migrating from another platform or store. Edit Subscribers – Correct or update existing subscriber entries directly from the admin. Custom CSS – Style the subscribe form with color, size, and custom CSS options. No coding needed. WPML – Send every email in the subscriber’s own language using WPML string translation. Polylang – Send subscription and restock emails in the subscriber’s chosen Polylang language. See the full catalog at propluginslab.com, with more add-ons coming soon. More Plugins by ProPluginsLab Free plugins All available free on WordPress.org: Recovero – Cart Recovery for WooCommerce – Recover abandoned carts automatically with reminder emails and win back lost revenue. Affireo – Affiliates for WooCommerce – Run your own affiliate program with referral tracking and commissions. Christmas Snow – Festive Snowfall Effect – Add a festive snow effect to your site for the holiday season. Pro plugins Nine standalone premium WooCommerce plugins, each a one-time payment with lifetime updates: Vendero – Multivendor for WooCommerce – Turn your store into a complete multi vendor marketplace with vendor dashboards, commissions and payouts. Recovero – Cart Abandonment Recovery for WooCommerce – Advanced abandoned cart recovery with automated follow up campaigns and detailed reporting. Anticipo – Pre-Orders for WooCommerce – Sell products before they are released and take payment upfront or on release. Trackero – Advanced Shipment Tracking for WooCommerce – Complete fulfillment manager. Add tracking numbers to orders and keep customers informed in order emails. Kitero – Composite Products for WooCommerce – Let customers build their own kits, boxes and product combos, with a built in product bundle feature. Giftero – Gift Cards for WooCommerce – Sell digital gift cards with customizable templates, scheduled delivery and balance management. Plusero – Extra Fees for WooCommerce – Add conditional fees and surcharges based on cart total, shipping method, payment gateway, category, user role and more. Inputo – Name Your Price for WooCommerce – Let customers choose their price. Perfect for donations, tipping and pay what you want campaigns. Affireo – Affiliates for WooCommerce – Full affiliate marketing suite with multi tier commissions, payouts and performance reports. Visit ProPluginsLab for all our premium WooCommerce plugins and solutions.

Are your WordPress emails not being delivered? Install Easy WP SMTP and you’ll resolve your email delivery issues. Easy WP SMTP allows you to configure and send all outgoing emails via 8 transactional mailers or an SMTP server. This will prevent your emails from landing in the spam folder and improve your deliverability. Now with a new Gmail/Google integration for the quickest set-up and reliable email sending. All you need to do is log into your Google account and allow Easy WP SMTP to send emails on your behalf. You will be up and running in less than a minute! Available in the Easy WP SMTP Pro. You can resolve your email deliverability issues by configuring one of these SMTP mailers: SendLayer (recommended) Amazon SES [Pro] Gmail / Google Mail / Google Workspace [Pro] Mailgun Mailjet Microsoft 365 / Outlook [Pro] SendGrid Brevo (formerly Sendinblue) SMTP.com Postmark SparkPost SMTP2GO Zoho Mail [Pro] Other SMTP – configure any SMTP mail server How Easy WP SMTP Fixes WordPress Email Delivery By default, WordPress sends mail using the PHP mail() function, which most hosting servers don’t configure correctly. That’s the number one cause of WordPress email delivery problems, and it’s why your emails land in spam or never arrive at all. Easy WP SMTP fixes WordPress email delivery by routing every outgoing message through a proper SMTP connection or transactional mailer. SMTP (Simple Mail Transfer Protocol) is the industry standard for sending email. When your WordPress site sends email through an authenticated SMTP server, mailbox providers can verify your messages, which dramatically improves email delivery and inbox placement. Easy WP SMTP makes SMTP setup simple – connect your SMTP server or mailer once, and the plugin handles SMTP authentication and reliable email delivery for every WordPress email you send. Whether you connect a custom SMTP server, use Gmail SMTP, Outlook SMTP, or a transactional SMTP service, Easy WP SMTP gives you dependable WordPress email delivery with no technical SMTP knowledge required. It is the easiest way to set up SMTP in WordPress and finally fix your email delivery for good. Easy WP SMTP Features Send WordPress emails using one of the transactional mailers or an SMTP server. Our Setup Wizard helps you configure your mailer or SMTP provider in no time. The fastest Gmail / Google mail integration on the market (configure it in just a couple of clicks). You can use different transactional mailers or SMTP: SendLayer, Amazon SES (Pro), Gmail / Google (Pro), Mailgun, Microsoft 365 / Outlook (Pro), SendGrid, Brevo (formerly Sendinblue), SMTP.com. Powerful Email Logging – log all mail sent from your WordPress site, resend emails, store attachments, and more. [Pro] Email Alerts – receive notifications via email, Slack, Microsoft Teams, Discord, SMS, or custom webhooks, when email fails to send from your site. [Pro] Backup Connection – if your primary connection fails to send an email, your backup connection will make sure your email will still get delivered. [Pro] Smart Conditional Routing – set up rules to route different types of emails through various mailers, based on many supported filters. [Pro] Rate Limiting – control the frequency of emails sent from your WordPress site within a given time to stay aligned with your SMTP provider’s limitations. [Pro] Optimized Email Sending – send emails in background to avoid site slowdowns and bottlenecks. [Pro] Generate email and delivery reports in your WordPress dashboard – see how many emails were sent, opened and clicked, with the Email Reports feature. [Pro] The Dashboard Widget shows you sent, delivered, failed, opened and clicked stats at a glance. [Pro] You can use Gmail, Outlook, Yahoo, Hotmail, Zoho, or any other SMTP server. Seamlessly connect your WordPress site with a reliable mailer or SMTP provider to handle all outgoing emails. Securely deliver emails to your recipients. Debug Events that log any failed email sending attempts and the error that caused them. Ability to specify a Reply-to or BCC email address. All features supported regardless of mailer or SMTP configuration! Custom SMTP server support – connect any SMTP host with your own SMTP port, SMTP username, SMTP password, and SMTP encryption settings. WordPress SMTP made easy – replace the unreliable default WordPress mailer with authenticated SMTP for better email delivery. Fix WordPress email delivery – stop WordPress emails from going to spam and improve email delivery across contact forms, WooCommerce, and notifications. Mailer Options Easy WP SMTP plugin includes different SMTP mailers, so you can choose the one that fits your needs. SendLayer SendLayer is our recommended transactional SMTP email service. SendLayer is very affordable, reliable, and fast, plus it has a simple setup. You can configure it in a few minutes. It offers 30 days of email logs history, with email open and click tracking. SendLayer offers hundreds of emails for free when you sign up for their trial. Read our SendLayer documentation for more details. Amazon SES Amazon SES is a great mailer for advanced or technical users who want to take advantage of Amazon Web Services (AWS) SES service to send high volume of emails. Read our Amazon SES documentation for more details. Gmail / Google Mail / Google Workspace With our Gmail integration you will be able to send emails from your Gmail or Google Workspace account. There is no technical setup required. All you need to do is log into your Gmail/Google Workspace account and allow Easy WP SMTP to send emails on your behalf. That’s it! It really is that easy. Other SMTP WordPress plugins will require you to go through a very long and technical setup in order to send emails via your Gmail account, but not Easy WP SMTP. We have made the process as simple as possible. Read our Gmail / Google documentation for more details. Mailgun Easy WP SMTP uses Mailgun API to reliably and quickly send out your WordPress emails. Read our Mailgun documentation for more details. Mailjet Enhance your WordPress email deliverability with Easy WP SMTP’s seamless Mailjet integration. Send transactional emails effortlessly, enjoying 6000 free emails per month via Mailjet. Read our Mailjet documentation for more details. Microsoft 365 (Outlook and Office 365) If your business utilizes Outlook.com, Microsoft Office 365, or Azure for email, our Microsoft 365 / Outlook mailer integration can help you enhance your email deliverability by enabling you to send emails from WordPress using your existing Outlook.com or Microsoft 365 account. Read our Microsoft 365 / Outlook documentation for more details. SendGrid Easy WP SMTP uses SendGrid’s API to send your WordPress emails. If you have an SendGrid account, all you’ll need is the API key to connect your account with our plugin. They offer a free account, so you can test its reliability. Read our SendGrid documentation for more details. Brevo (formerly Sendinblue) Our plugin offers native integration with Brevo (formerly Sendinblue). All you have to do is open a Sendinblue account and copy the API key. They offer a free account with 300 emails per day. Read our Brevo documentation for more details. SMTP.com SMTP.com is a powerful transactional email service, with over 23 years of experience. You can get started with a 30-day trial account, where you can send up to 50,000 emails. Read our SMTP.com documentation for more details. Postmark Postmark is a transactional email service with great deliverability and budget-friendly pricing. You can start out with their free trial option, which allows you to send up to 100 emails per month through their secure API. Read our Postmark documentation for more details. SparkPost SparkPost is a transactional email provider, designed to provide high-speed, reliable, and secure email delivery. You can get started with the free test account that lets you send up to 500 emails per month. Read our SparkPost documentation for more details. SMTP2GO SMTP2GO delivers a powerful and reliable email service for transactional emails, supported by a worldwide infrastructure, detailed real-time analytics, and robust security measures. New users can take advantage of SMTP2GO’s free plan, which includes up to 1000 emails per month. Read our SMTP2GO documentation for more details. Zoho Mail If you use Zoho Mail for email communication, our Zoho mailer integration offers a robust solution to streamline your WordPress email delivery. This integration allows you to send emails directly through your Zoho account, leveraging its reliable infrastructure for improved deliverability. Read our Zoho Mail documentation for more details. Other SMTP With our Other SMTP mailer, you can configure any SMTP server to send your WordPress emails. You can use your own SMTP server, or any of the popular email providers: Gmail, Outlook, Yahoo, Zoho, Hotmail, … Read our Other SMTP documentation for more details. Debug Events Debug Events is a feature that will log all your failed email sending attempts and provide additional information on why it failed and from which plugin the email was sent from. You can enable the Debug Email Sending option and all email sending attempts will be logged (not just the failing ones), so you can debug any delivery issues. Easy WP SMTP Pro Easy WP SMTP Pro provides awesome features that will improve your email deliverability (Amazon SES, Gmail / Google and Microsoft 365 / Outlook mailers) and help you monitor all your WordPress emails (Email Logs, Email Reports, enhanced Dashboard Widget, enhanced Weekly Email Summary, and more). Click here to purchase Easy WP SMTP Pro now! Email Log With our Email Logging, you can easily store and view a record of all emails sent from your website, providing you with a valuable resource for record-keeping, ensuring email compliance, and debugging during site development. Our WordPress email logs go beyond just recording emails. With advanced analytics and features, you can measure email engagement and improve email deliverability: Resend Emails Email Logs make it simple to resend or forward any email directly from the log, which can be incredibly helpful for resending failed emails or forwarding important messages. You can also take advantage of the bulk resend option to quickly resend multiple emails at once. Open and Click Email Tracking Gain deeper insights into the performance of your WordPress emails by using our email log feature to track opens and clicks. This feature allows you to measure engagement rates and optimize your messaging and calls-to-action for better results. Save Email Attachments Keep track of all email attachments sent from your WordPress site. This feature allows you to store attachments in one place, making it easy to review and archive them. Export Email Logs Export your WordPress emails to CSV, EML, or Excel with ease using our intuitive exporter. You can filter the logs by date range, search term, or other criteria to extract only the data you need for your reporting or analysis. Print Emails Our email logging feature allows you to easily print any email in a clear and easy-to-read format, making it simple to keep track of important email communications. Additionally, you can export email logs to PDF format for convenient digital archiving. Email Alerts Receive instant notifications if your emails fail to send, with alerts available through Slack, Microsoft Teams, Discord, SMS/Twilio, webhooks, or email via a secure API. Combined with our email logging and resending capabilities, Email Alerts guarantee that no critical email will ever be overlooked. Backup Connection Add a secondary connection that takes over if your main one fails. Easy WP SMTP identifies connection errors and effortlessly shifts to the backup mailer, ensuring that failed emails are automatically retried. Smart Conditional Routing Set up rules to route different types of emails through various mailers. You can filter by the email’s Subject, Message content, From or To addresses, the plugin that generated the email, and more. This approach lets you combine transactional and marketing providers for enhanced deliverability. Rate Limiting Control the frequency of emails sent from your WordPress site within a given time to stay aligned with your SMTP provider’s limitations. Easy WP SMTP lets you set limits on how many emails can be sent each minute, hour, day, week, or month and automatically manages the email queue to keep you within the allowed rate. Optimized Email Sending Is email sending affecting your site’s speed? Easy WP SMTP can queue your emails to enhance performance. With optimized sending, emails are sent in the background when server resources are available, helping to avoid site slowdowns and bottlenecks. Email Reports Track email deliverability and engagement with our email reports feature, which displays open and click-through rates grouped by subject line, regardless of mailer or SMTP service. The reports also include information on sent and failed emails each week, ensuring that you’re always aware of potential issues. Plus, you can view an email report chart right in your WordPress dashboard for quick and easy access. Weekly Email Summary Stay on top of your WordPress email statistics with our weekly email reports, sent to your inbox. These reports provide in-depth information on the number of emails sent, as well as opens and clicks. The Summary also shows failed email delivery stats, allowing you to quickly identify any potential issues without having to log into WordPress. WordPress Multisite WordPress Multisite Network Settings Manage Easy WP SMTP settings for all your multisite subsites in one place, simplifying administration for your multisite network. Easily Manage Multisite Emails Network administrators can easily monitor and manage email logs, email reports, debug events, and exports for all subsites in the network from a central dashboard. Who Is Easy WP SMTP For? Easy WP SMTP works on any WordPress site that sends email, from a small blog to a high-traffic store. Here is who gets the most value from reliable email delivery. WooCommerce and Online Stores Order confirmations, shipping updates, and password resets have to land in the inbox. Easy WP SMTP sends your WooCommerce emails through an authenticated mailer so customers actually receive them. Contact Forms and Lead Notifications When form entries from WPForms, Contact Form 7, or Gravity Forms stop arriving, the cause is almost always the default WordPress mailer. Connect an SMTP mailer once and every notification gets delivered. Membership, LMS, and Community Sites Welcome emails, account notices, and course updates keep your members active. Authenticated SMTP makes sure new sign-ups can confirm their account and log in without emails getting lost. Agencies and Freelancers Set up …