Blog tag

cold email deliverability

OutboundXYZ articles for this outbound topic.

spf dkim dmarcAug 13, 2026202615 min read

SPF DKIM DMARC Explained: A Practical Setup Guide

SPF DKIM DMARC explained with DNS examples, alignment rules, and troubleshooting tips so cold email and outbound stacks actually land in the inbox.

bounce rate reductionJul 29, 2026202611 min read

Achieve bounce rate reduction with our operator playbook covering diagnosis, list hygiene, authentication, and outreach fixes.

550 permanent failureJul 25, 2026202615 min read

Learn what 550 permanent failure means in email, why it happens, and how to diagnose and fix it for healthier cold outreach and outbound campaigns.

The outbound tool memo.

One useful note when a tool is worth testing, skipping, or swapping out of your stack.