Overview
Sender health, outreach ready status, and Email WarmUp measure the reputation of your mailbox, but inbox placement also depends on how the receiving provider treats email coming from your sending provider.
So even when your sender health is above 95, outreach status shows "ready to send", and WarmUp shows no problems, an Inbox Placement Test can still report spam placement for some seed addresses.
Why This Happens
Unfortunately, email service providers have started treating cross-provider email more strictly:
- Emails sent from Google to Google usually land in the inbox.
- Emails sent from Google to Outlook may land in spam, even from a perfectly healthy sender, and the same applies in reverse.
This means your Inbox Placement Test can show Google → Google working fine while Google → Outlook lands in spam. This is provider-level filtering, not a problem with your sender health, WarmUp, or your SalesBlink setup.
What You Can Do
As recommended in our Email Deliverability Best Practices, everyone should start with a mix of providers:
- Connect at least a couple of Google mailboxes and a couple of Outlook mailboxes.
- Add all of them as email senders in your sequence.
- When the sequence sends emails, sender rotation randomly picks a sender, so Outlook → Outlook and Google → Google emails land in the inbox far more reliably.
You can also enable Provider Matching so SalesBlink automatically sends each email from a sender on the same provider as your lead whenever possible.
Note: A cross-provider spam result in the Inbox Placement Test does not mean your mailbox is unhealthy — it reflects how the receiving provider filters mail that arrives from a different provider.