DNS records can be technically correct and a domain can still land in spam. Placement and blacklist testing is the verification step that confirms your infrastructure actually delivers to the primary inbox, not just that it is configured correctly on paper.
Inbox Placement Testing
Before any domain is cleared for real campaign traffic, we send test emails through the exact sending platform and sequence structure your campaigns will use, then check where those emails land across Gmail, Outlook, and Yahoo specifically, since these three providers cover the overwhelming majority of B2B inboxes. Placement is checked in the primary inbox, promotions tab, and spam folder separately, using GlockApps for automated, repeatable placement testing across dozens of seed accounts simultaneously.
Blacklist Audit
- Every sending domain and its associated IP ranges checked against 100+ major blacklists including Spamhaus, Barracuda, and SORBI
- MXToolbox used for DNS record validation alongside blacklist status in a single pass
- Mail-Tester used for a full spam score breakdown covering content, links, and authentication together
- Any listing found is disputed and removal requested before the domain is cleared for use
Ongoing Monitoring, Not a One-Time Check
Placement and blacklist status are not checked once and forgotten. We run automated weekly blacklist monitoring for the life of the campaign, so if a domain gets listed mid-campaign from a spam complaint or an aggressive send pattern, we catch it within days rather than discovering it a month later when replies have already dried up.
What a Clean Result Looks Like
A domain is cleared for full campaign use only once it shows zero blacklist listings, primary-inbox placement across all three major providers, and a Mail-Tester score of 8 or higher out of 10.