Seeding results may differ by region for a variety of reasons. The differences are often related to:
- Time of day: If you send email internationally without being mindful of time zones, your email campaign may not get the necessary subscriber engagement to help a mailbox provider filter the email. In this case, they may make more filtering decisions based on your sending reputation and past performance. If one regional provider does have more information to make a filtering decision, then you may see differences in deliverability.
- Subscriber behavior: Because of our global diversity, subscriber behavior most likely differs around the world. If your email campaign receives a high number of complaints in one region and a lower number of complaints in another region, it may be significant enough to show different results.
- Segmentation: You may send different email campaigns based on a country or region. If you are sending to certain segments, such as engaged versus unengaged subscribers, and depending on the specific email campaign, your deliverability results can vary based on the region.
- Mailbox provider filtering differences:
- Some regional mailbox providers adjust their filters to take into account certain region-specific information, such as local spam laws, spammer tactics, local marketer’s sending behaviors and subscriber feedback.
- Some regional mailbox providers use very different filtering algorithms based on the organizational structure of that provider. For example, Yahoo Japan has different filtering algorithms than Yahoo United States due to different company ownership stakes as well as local subscriber preferences and behavior.
