Category: DNS & Domains
DNS & DomainsPTR records and reverse DNS are among the most overlooked pieces of email infrastructure — yet a missing or misconfigured PTR record can cause your messages to be rejected before any content filter looks at them. Here's what PTR records are, why receiving servers check them, and how to get yours right.
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DNS & DomainsDomain hijacking can take down your email, destroy your sender reputation overnight, and take weeks to fix. Here's how to lock down your domain and prevent attackers from seizing control before it happens to you.
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DNS & DomainsMX records are what tell the internet where to deliver email for your domain. Get them wrong and you lose mail silently. This guide explains how MX records work, how priority values function, and the mistakes that cause delivery failures.
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DNS & DomainsDNS changes are the most common source of self-inflicted email outages. Getting them right means pre-lowering TTLs, sequencing MX changes carefully, validating SPF syntax before publishing, and verifying authentication results after every modification.
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DNS & DomainsPTR records map an IP address back to a hostname — and receiving mail servers check them on every inbound connection. Without a correctly configured PTR record and forward-confirmed reverse DNS, your messages pick up a reputation penalty before content is even evaluated.
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DNS & DomainsDNS TTL values control how long records are cached — and setting them wrong means waiting unexpectedly long for changes to take effect. This guide covers the right TTL values for MX, SPF, DKIM, and DMARC records, and how to prepare for DNS changes without surprises.
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DNS & DomainsMost DNS guides focus on SPF, DKIM, and DMARC — but PTR records and reverse DNS are just as critical for email deliverability. Here's what they do, why receiving servers check them, and how to set yours up correctly.
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DNS & DomainsChanging email DNS records — MX, SPF, DKIM, DMARC — without disrupting mail flow requires the right sequence and timing. Get it wrong and you'll drop email during the transition. Here's how to do it safely.
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DNS & DomainsBackup MX records used to be standard advice, but a poorly maintained one can do more harm than good. Here's when you actually need one and how to configure it safely.
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