Tagged: DNS configuration
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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Email AuthenticationSPF records tell receiving servers which IPs are authorized to send email from your domain — but they're also one of the most commonly misconfigured DNS records. This guide covers how SPF works, how to set it up correctly, and how to avoid the lookup limit trap that quietly breaks many production setups.
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Email AuthenticationDKIM signs your outgoing emails with a cryptographic key so receiving servers can verify the message is genuine and hasn't been tampered with. This guide explains how DKIM signing works, how to set it up on managed and self-hosted infrastructure, and how to troubleshoot the issues that come up most often.
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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 & DomainsBackup MX records made sense when self-hosted servers had real downtime risk. In 2026, the calculus has changed — cloud email infrastructure handles redundancy internally, and a misconfigured backup MX can introduce new spam vulnerabilities.
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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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Email HostingManaging email across multiple company domains from separate platforms creates unnecessary overhead and visibility gaps. Multi-domain email hosting consolidates everything into one account while keeping each domain's identity, DNS configuration, and sender reputation fully independent.
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DNS & DomainsDNS TTL values control how long your records are cached worldwide. The wrong TTL can slow email migrations, cause delivery downtime, or lock you into bad records for hours longer than expected.
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