The Verifalia PHP SDK by Cobisi provides email validation implementation with the HTTPS API. An example available presents token configuration. It also shows how to submit an email address to Verifalia without waiting for completion.
Our API directory now includes 199 email APIs. The newest is the Uptime Robot API. The most popular, in terms of mashups, is the SendGrid API. We list 10 SendGrid mashups. Below you'll find some more stats from the directory, including the entire list of email APIs.
Railsware, creator of Mailtrap (email test environment), has released the Mailtrap API. Mailtrap provides a "fake" SMTP server so developers can test email environments without the need of actual customers or users. Mailtrap has proved a useful tool to the developer community; however, API access to Mailtrap features has been desired for third party integration. Mailtrap Product Manager, Pavel Pavlovsky, announced that numerous developers requested API access over the past year and Railsware is happy to announce its availability.