Deliverability
Reputation, list quality, bounces, and inbox placement.
3 topics in this category.
Reverse DNS (PTR) & Forward-Confirmed Reverse DNS (FCrDNS)
RequiredConfigure Forward-Confirmed Reverse DNS (FCrDNS) on every sending IP address, ensuring the PTR record matches the forward A/AAAA record and the SMTP EHLO greeting.
Mailing List Hygiene & Recipient Validation
RequiredMaintain pristine sender reputation through automated bounce management, double opt-in confirmation, inactive subscriber sunsetting, and spam trap avoidance.
Spam Complaint Handling & Feedback Loops (FBL)
RequiredProcess user spam complaints in real-time through ISP Feedback Loops (FBL) and RFC 5965 Abuse Reporting Format (ARF) to maintain spam complaint rates below 0.10%.