Mock sample for your project: Mandrill API

Mandrill is a reliable, scalable, and secure delivery API for transactional emails from websites and applications. It's ideal for sending data-driven transactional emails, including targeted e-commerce and personalized one-to-one messages.

The Single Validation API does validation on a single email address and returns all the validation results in either JSON or XML format. Refer to https://www.mailboxvalidator.com for further information.

The general-purpose API

The postyAPI is the core element of the posty softwarestack. It is developed to administrate a mailserver based on Postfix and Dovecot. It offers an easy REST interface which can be used in own applications or with the posty client applications, postyCLI and posty_webUI.

Postmark makes sending and receiving email
incredibly easy. The Account-level API allows users to
configure all Servers, Domains, and Sender Signatures associated
with an Account.

The Beta endpoints for the new Email Activity APIs - functionality is subject to change without notice. You may not have access to this Beta endpoint.
Email Activity offers filtering and search by event type for two days worth of data. There is an optional add-on to store 60 days worth of data. This add-on also gives you access to the ability to download a CSV of the 60 days worth of email event data. The Beta endpoints for the new Email Activity APIs - functionality is subject to change without notice. You may not have access to this Beta endpoint.
Email Activity offers filtering and search by event type for two days worth of data. There is an optional add-on to store 60 days worth of data. This add-on also gives you access to the ability to download a CSV of the 60 days worth of email event data.

The MailboxValidator Disposable Email Checker API checks if a single email address is from a disposable email provider and returns the results in either JSON or XML format. Refer to https://www.mailboxvalidator.com/api-email-disposable for further information.

ScrapeWebsiteEmail is a service that exposes an api to fetch e-mails from a website.

The MailboxValidator Free Email Checker checks if a single email address is from a free email provider and returns the results in either JSON or XML format. Refer to https://www.mailboxvalidator.com/api-email-freem for further information.

MailSquad offers an affordable and super easy way to create, send and track delightful emails.

Postmark makes sending and receiving email
incredibly easy.