Inbound relay
SparkPost
SparkPost is an inbound relay. Type any domain below to see if its email runs through SparkPost.
Provider profile
SparkPost
SparkPost is an inbound relay. Its mail servers' hostnames end in .sparkpostmail.com.
What is an inbound relay?
An inbound relay accepts mail over SMTP and hands it off to an application via API or webhook. There is no human inbox at the other end.
MX hostname patterns
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.sparkpostmail.com
Other inbound relays
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