Email Deliverability Checker

This is the all-in-one check. Enter your domain and it runs your SPF, DKIM, DMARC, MX, and BIMI configuration in a single scan, then scores your setup out of 100 and lists what to fix first.

It's the fastest way to see whether your sending infrastructure is ready. Authentication is the foundation of deliverability: if SPF, DKIM, or DMARC is missing or misconfigured, your mail is far more likely to land in spam no matter how good your copy is.

Deliverability is reaching the inbox - not the spam folder, not a bounce, not a black hole. It isn't the same as delivery rate: delivery rate just counts accepted mail, while deliverability measures inbox versus spam.

The factors that decide it, roughly in order: sender reputation (history, complaints, bounces, engagement, volume patterns), authentication (SPF, DKIM, DMARC), list hygiene, sending patterns (consistent looks legitimate, erratic bursts look like spam), and content quality. Content matters, but less than most people think - authentication and reputation carry far more weight.

Cold email is held to a higher bar because you're emailing people who didn't opt in, so mailbox providers give you less room for error. The setup that survives it is specific: send from separate domains (never your primary business domain), authenticate every sending domain properly, warm up each mailbox gradually over two to four weeks, and rotate volume across mailboxes and domains rather than blasting from one.

A common symptom of getting this wrong is a cold-email open rate below 15 to 20 percent - almost always an authentication or reputation problem rather than a copy problem. Good cold email is also short (50 to 125 words), plain-text, with zero or one links, and reads like a human wrote it.