Deliverability
Why Cold Emails Go to Spam
Diagnose common causes of cold email spam placement without relying on misleading inbox guarantees.
Cold email can go to spam because of weak authentication, poor domain or IP reputation, sudden volume changes, low-quality lists, complaints, misleading content or recipient-specific filtering. Diagnose signals systematically; no tool can guarantee inbox placement.
Separate technical and audience problems
Authentication failures and DNS mistakes are technical. Low engagement, complaints and invalid recipients indicate audience or sending-practice problems. Rewriting one subject line will not repair a broken SPF record, and perfect DNS will not fix irrelevant outreach.
Inspect provider responses, bounce reasons, complaint data where available and performance by mailbox. A campaign-wide average can hide one damaged sender.
Common corrective actions
Pause suspicious traffic before making several changes at once.
- Verify SPF, DKIM and DMARC alignment.
- Remove invalid and suppressed contacts.
- Reduce abrupt or concentrated volume.
- Use honest identity, copy and links.
- Follow provider sender requirements.
Treat delivery as feedback
Accepted by server does not prove inbox placement. MailQV exposes mailbox-level controls and campaign outcomes without promising a result providers alone determine.
Official sources
Provider limits and policies can change. These official pages were reviewed on 2026-09-14.
Put it into practice
Run measured outreach with mailbox-level control.
MailQV connects sender rotation, sequences, contacts and campaign signals without claiming guaranteed inbox placement.