Adds a SparkPost mail transport option to have all mails sent via your
SparkPost account.
This is the XF v2.2 compatible version of
https://xenforo.com/community/resources/sparkpost-mail-transport.7537/ and has been completely rewritten to support Swiftmailer v6 library that is part of XF v2.2
This addon has full bounced email and unsubscribed email handling support using the SparkPost Events API - no mailbox required.
Setup
If...