How to use custom bounce domain in SparkPost?

Step 1 : Add you bounce subdomain under your SparkPost account

Step 2 : Add CNAME entry to your DNS manager, Check SparkPost panel for CNAME values

Step 3 : Varify CNAME in you SparkPost account

Step 4: Add/update return_path value in YOUR API posting “”return_path””:””””

* NOTE : You have to write as value, only will not work. You can use anything instead of donotreply

For SMTP – You will need to specify the bounce domain in the SMTP MAIL FROM command.

Mail admin(at) for any SparkPost help