To ensure the highest degree of security and stability for our customers, SparkPost will be disabling a number of insecure TLS and stream cipher protocols on or after October 15. These include TLSv1, ECDHE-RSA-RC4-SHA, RC4-MD5, and RC4-SHA. This change will affect both REST and SMTP injection endpoints. # How will I know if I'm affected?…

Free plans even with Add-ons such as a dedicated IP or previous overages are still subject to the same Free plan support changes, which means that case support will end on October 16th 2017. You are still able to contact our Billing team via [email protected] should you have any queries on payments etc. All accounts…

Your plan settings will remain as they are now. If you need a larger daily limit, please upgrade to one of our new plans. Please note that daily limits are always based on your account’s sending performance and history with SparkPost and are reviewed on a case by case basis.

The older paid plans no longer offer the ability to add dedicated IPs to your account. If you require dedicated IPs please upgrade to one of our new plans from the Accounts/Billing page. Please note that new plans from 150K upwards include a dedicated IP, allowing you to add an IP Pool and new IP.…

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.