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STARTTLS is opportunistic, so a downgrade attack can strip encryption silently. MTA-STS lets you publish a policy requiring TLS for delivery to your domain.

Adding IPv6 to email infrastructure brings blind spots: IPv6 starts with zero reputation, blacklisting works differently, and many setups only check IPv4.

The DMARCbis spec is finalized as three separate RFCs. Here's what changed, what got removed, and what it means for your email authentication setup.

SPF, DKIM, and DMARC are table stakes. Inbox placement is driven by IP and domain reputation, engagement, list hygiene, and sending patterns. What matters most.

MCP lets AI assistants connect to your Generator Labs account to query hosts, check certificates, and run RBL checks without leaving your AI tool.

Most people set up DMARC and never look at the RUA reports. The XML is dense. Here's how to read it and use the data to tighten your policy.