Jango SMTP is a transactional email delivery service that adds tracking and authentication to email. Using the service allows for open tracking, click tracking, DomainKeys/DKIM signing, grouping, logging, and extreme email delivery. The Event API can make an HTTP call to any web service or web page upon a specified event without requiring polling. Events include sending and opening of email, a click of a URL in an email, an unsubscribe or bounce and compalints.
The following is a list of SDKs from our SDK directory that matched your search term. Though your definition of an SDK may differ, in our world, we define SDKs as platform- specific tools for consuming existing APIs of the sort we list in our API directory. For example, the Ruby SDK for consuming the Twitter Ads API. If you think an SDK, API, or other asset is missing from our directory, be sure to check our guidelines for making contributions to ProgrammableWeb.