What is Spam Score & Sender Reputation?
A spam score estimates how likely a message or sender is to be filtered as spam, based on factors like sender reputation, authentication, content, and recipient engagement. A high spam score sends mail to the junk folder; a strong sender reputation — built through authentication, warmup, and low complaint rates — keeps you in the inbox.
How do you lower your spam score?
Authenticate with SPF/DKIM/DMARC, warm up new senders, keep lists clean, avoid spam-trigger content and excessive links, and maintain healthy engagement so complaints stay low. Run a draft through the spam score checker, and see inbox warmup for new senders.
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Email Deliverability
Email deliverability is the measure of whether your emails actually reach recipients’ primary inboxes rather than the sp…
Inbox Warmup
Inbox warmup is the process of gradually building a new email account’s or domain’s sending reputation before running ou…
SPF (Sender Policy Framework)
SPF (Sender Policy Framework) is a DNS record that specifies which mail servers are authorized to send email on behalf o…
DMARC
DMARC (Domain-based Message Authentication, Reporting & Conformance) is a DNS policy that builds on SPF and DKIM. It tel…
Questions
Spam Score & Sender Reputation — FAQ
What hurts sender reputation the most?
High bounce rates, spam complaints, sending to stale or purchased lists, and sudden volume spikes from an unwarmed domain.
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