Other features include protection from spam filters

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SendLayer works seamlessly with the WP Mail SMTP plugin to connect to your WordPress website. It also works with platforms like WooCommerce , BigCommerce, Magento, Drupal, HelpScout , and others.

You can use SendLayer's API and SMTP relay to reliably send transactional emails, confirmation emails, delivery notifications, password resets, and more.

Also, SendLayer provides detailed email logs that help you track your outgoing messages . You can see whether your email was sent successfully or not, as well as view open rates, click rates, and unsubscribes.

, subdomains to protect your reputation, built-in email list management, and top-notch customer support.

Pricing: SendLayer offers a free trial that lets you list of spain cell phone number send up to 200 emails. Paid plans start at just $5 per month for 1,000 emails per month and advanced features like suppression management and event-based webhooks.

2. SMTP.de
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SMTP.com is a leading SMTP service provider in the market, used by over 100,000 companies worldwide.

They offer a robust API for sending transactional emails that integrates seamlessly with WordPress via the popular WP Mail SMTP plugin .

Since SMTP relay is the focus of their business, they offer some of the best deliverability in high volume email situations.

You get complete reports on the number of emails sent, views, bounce rates, clicks, etc. The domain reputation management features ensure that your email always lands in the user's inbox.