Technical guides on email authentication, deliverability, and infrastructure configuration.
The team behind FXRM has been running email infrastructure since the early 1990s — from MMDF and Sendmail to Postfix and Zimbra. Here’s what actually matters for getting mail delivered.
Three records. Three different jobs. Most guides treat them as a checklist. This one explains what actually happens when each one fails — and why all three must work together.
Most email deliverability problems aren’t content problems. They’re infrastructure problems — a PTR mismatch, a DMARC policy set to none, a shared IP on a blacklist. Here’s what’s actually going wrong and what to do about it.
Shared cPanel hosting concentrates thousands of senders on the same IP pools. One bad actor affects everyone. Here’s the mechanics of why it happens and how to fix it.
DMARC aggregate reports arrive as XML attachments from every major mail provider. This guide shows you exactly how to interpret them and what to look for.