Email Deliverability Checker

Email deliverability is the ability of your emails to reach the recipient's inbox rather than being filtered into spam or bounced. It matters because even the best email content is worthless if it never gets seen. Poor deliverability means wasted effort, lost revenue, and damaged sender reputation. Most businesses lose 20-30% of their emails to spam filters without realizing it.

SPF (Sender Policy Framework) tells receiving servers which IP addresses are authorized to send email from your domain. DKIM (DomainKeys Identified Mail) adds a digital signature to verify email authenticity. DMARC (Domain-based Message Authentication) tells receivers what to do with emails that fail SPF/DKIM checks. Together, these three protocols form the foundation of email authentication and are required by Google and Yahoo as of February 2024.

Start with the basics: configure SPF, DKIM, and DMARC on your domain. Use a custom sending domain, warm up new IPs gradually, maintain clean email lists by removing bounces and inactive subscribers, implement double opt-in, include visible unsubscribe links, and send consistently rather than in irregular bursts. Monitor your bounce rate (keep under 2%) and spam complaint rate (keep under 0.1%).

A score of 85+ is excellent, meaning you have strong authentication, good infrastructure, and sound sending practices. 65-84 is good but has room for improvement. 40-64 is fair and likely means emails are hitting spam for some recipients. Below 40 means significant deliverability issues that need immediate attention. Most businesses should aim for 85+ to maximize inbox placement.

Dewx handles email deliverability automatically. It configures SPF, DKIM, and DMARC for your sending domain, manages IP warm-up when you start sending, monitors bounce and complaint rates in real-time, automatically cleans your contact lists, and provides deliverability analytics so you can track inbox placement rates across providers.