To ensure the highest degree of security, SparkPost will be disabling a number of insecure TLS and stream cipher protocols on or after October 15.

Free plans even with Add-ons such as a dedicated IP or previous overages are still subject to the same Free plan support changes. Learn more here.

Your plan settings will remain as they are now. If you need a larger daily limit, please upgrade to one of our new plans.

Read up on if you can add a dedicated IP to your existing paid plan. The older paid plans no longer offer the ability to add dedicated IPs to your account.

When you switch to a new plan (either upgrade or downgrade), you won’t be able to later switch back to an old plan that we no longer offer.

If you send mail through SMTP rather than REST, you may encounter some SMTP error messages. Here's what to do when you receive them.

If you're sending via SMTP you may wonder why configure DKIM? Learn why configuring DKIm is the best way to protect your sending reputation.

Our sink server allows you to perform sink test messages for integration testing without attempting delivery of email to actual addresses.

Understanding delays and bounces. If the final disposition for messages sent from SparkPost is delivered or bounced, what are delays? Learn more here.