Ensuring your email's HTML uses only inline styles can be an onerous task, SparkPost includes a CSS inlining feature to automate this at transmission time.
Using CC and BCC with the REST API
Wondering how to use CC and BCC with the REST API? This article is a great place to start! Discover how to use CC and BCC with the REST API today.
What are the differences between CC, BCC, and archive recipients?
cc, bcc, and archive recipients have the same reporting events as regular recipients but there are subtle differences between these messages in the headers
Can I send from any domain?
You can send email via SparkPost from any domain that you or your customers control, but what if you need to send on behalf of others? Here are the steps.
Does SparkPost Send Emails as Encrypted Messages?
Learn about all the types of encrypted messages SparkPost support, including Transport Layer Security (TLS). SSL/TLS, STARTTLS and more
After Receiving a 250 OK, Why Are Messages Being Rejected?
Some answers to the question "why are messages being rejected after receiving a 250 ok", with links to resources to correct the error.
How Do I Access the REST APIs?
Information on how to access the REST APIs and acquire an API key with appropriate permissions for that API.
If you are having trouble contacting firstname.lastname@example.org, you've received an email from them, sent your reply but never heard back, here are options.