Getting your emails delivered to the primary inbox is the foundation of outbound success. The technical setup rules have changed. Here is how you configure your infrastructure to maintain 99%+ deliverability.
1. Secondary Domains Configuration
Never send outbound campaigns from your primary domain. If someone marks your email as spam, your main business operations (invoices, client communications) will suffer. Instead, buy similar domains (e.g. getaroi.com instead of aroi.com).
2. SPF, DKIM, and DMARC Settings
Authentication is mandatory. Mail servers reject unauthenticated domains. Ensure you set up:
- SPF (Sender Policy Framework): Specifies which servers can send mail for your domain.
- DKIM (DomainKeys Identified Mail): Adds a digital signature to verify the mail wasn't altered.
- DMARC (Domain-based Message Authentication): Instructs receiving servers how to handle failures.
3. The Warm-Up Protocol
Never send emails from a brand new domain. You must warm up domains for 14-21 days by slowly scaling sending volume and generating positive interaction history (marking received mail as safe, replying to threads).