Tagged: DNS
SMTP & InfrastructureMX records control where email for your domain gets delivered. This guide explains how MX lookups work, how to configure priority and redundancy, and what mistakes to avoid when setting up or migrating email.
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Email AuthenticationSPF enforces a hard cap of 10 DNS lookups. Exceed it and your record returns a permerror that breaks authentication for every mail you send. Here's how to diagnose and fix it.
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Email AuthenticationDKIM keys should be rotated regularly, but doing it wrong can break authentication for messages already in flight. This step-by-step guide shows how to rotate selectors safely.
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SMTP & InfrastructureA missing PTR record triggers Outlook to reject your mail with a 550 error. This guide explains what reverse DNS is, why mailbox providers check it, and how to configure forward-confirmed reverse DNS for your sending IP.
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