What Secure Ciphers does SparkPost Support?
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.
I have paid for overages or have a dedicated IP on my Free plan, how does this affect my support moving forward?
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.
If I stay on my plan, can I increase my daily limits?
Your plan settings will remain as they are now. If you need a larger daily limit, please upgrade to one of our new plans.
Can I add a dedicated IP to my existing Paid plan?
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.
Can I switch back to an old plan?
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.
Error messages when using SMTP
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.
Why Configure DKIM?
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.
How Do I Test Using the Sink Server on SparkPost?
Our sink server allows you to perform sink test messages for integration testing without attempting delivery of email to actual addresses.
Message Delivery: Understanding Delays and Bounces
Understanding delays and bounces. If the final disposition for messages sent from SparkPost is delivered or bounced, what are delays? Learn more here.