Email Deliverability
What is Email Deliverability?
Deliverability is the measure that matters most and the metric most people track least. Inbox providers (Gmail, Outlook, Yahoo) score every sender on reputation: low bounce rate, low spam complaint rate, high engagement (replies, marks-as-not-spam), proper authentication (SPF, DKIM, DMARC), and consistent send patterns. Senders with high scores reach the inbox; senders with poor scores get filtered to spam or quietly throttled. The four-part discipline of maintaining deliverability is: warm mailboxes properly, send to verified addresses only, write content that doesn't trip spam filters, and monitor reputation continuously. Neglect any one of the four and the others compensate only partially.
Why it matters
- An email that reaches spam is an email that didn't exist — the campaign metrics are meaningless if delivery fails.
- Reputation is hard to rebuild — a damaged sender domain can take months to recover.
- The single highest-leverage email investment most teams under-invest in.
Use cases
- Pre-campaign verification. Every address verified before being added to a campaign list.
- Reputation monitoring. Continuous tracking of sender score, blocklist status, and engagement rate.
- Authentication audit. SPF, DKIM, DMARC properly configured for every sending domain.
How turgo helps
turgo's sending infrastructure handles warm-up, verification, authentication, and reputation monitoring as background work — so deliverability stays high without explicit operator attention.
See turgo in action →
