How does Sparkpost obtain inbox placement data?

Email marketer from EmailGeeks explains that SparkPost uses a network of mailboxes at different ISPs. They send emails to these mailboxes and check where the emails are delivered to monitor their deliverability.

Marketer from Email Geeks shares that they use a mix of traditional non-engaging seeds and also engaging seeds that use machine modeling to build up nightly engagement models that do engage with the emails in realistic engagement patterns

Email marketer from Mailtrap Blog shares that SparkPost uses seed lists, which are email addresses at various ISPs, to track inbox placement. By sending test emails to these seeds and monitoring where they land (inbox, spam, etc.), SparkPost can provide deliverability metrics.

Email marketer from Sparkpost explains that they use traditional non-engaging seeds as well as seeds that are more engaging that use machine modelling to engage realistically with emails.

Expert from Email Geeks explains that Sparkpost has mailboxes at ISPs that belong to them. When mail is sent, it's also sent to those mailboxes, allowing Sparkpost to check for mail and determine its delivery location.

Expert from Word to the Wise explains the importance of feedback loops in maintaining good sending reputation, which indirectly contributes to inbox placement monitoring, as high complaint rates negatively impact placement.

Documentation from Yahoo shares that mailbox providers like Yahoo make delivery data available directly to platforms to improve deliverability

Documentation from SparkPost explains that they maintain a global seed list, sending to these addresses and monitoring placement to provide insights into deliverability.

Documentation from Google indicates that they provide feedback loops (FBLs) to ESPs. These FBLs provide aggregated data on spam complaints, allowing ESPs like SparkPost to monitor and improve their sending reputation and inbox placement.