SMTP & InfrastructureTransactional email — password resets, receipts, alerts, two-factor codes — is business-critical infrastructure. Here's how to design a reliable, scalable sending setup that handles growth without dropping messages or hurting reputation.
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Email OperationsMost email teams track opens and clicks. The metrics that actually tell you whether your email infrastructure is healthy are a different list — and most teams aren't watching them until something goes wrong.
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SMTP & InfrastructureAn exposed or misconfigured SMTP server is an open invitation for relay abuse, credential attacks, and spam injection. This checklist covers the specific hardening steps every mail administrator should complete before a server handles real traffic.
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Email AuthenticationBIMI lets your logo show up next to your emails in the inbox — but only after your domain enforces DMARC. Here's what it actually takes to set it up correctly.
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SMTP & InfrastructureSTARTTLS encrypts most email in transit, but its opportunistic design means a downgrade attack can silently push a message back to plain text. Here's how it works and how to close the gap.
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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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Email ComplianceCAN-SPAM doesn't require opt-in consent, but its rules around honesty, disclosure, and unsubscribe handling are specific — and the FTC does enforce them. Here's what actually matters for compliance.
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Email ClientsMost delivery problems leave a clear trail in the raw email headers — you just have to know which fields matter. Here's how to read them and what to look for.
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Cold EmailCold email infrastructure needs its own domains, its own warm-up plan, and its own authentication — separate from your main business email. Here's how to set it up so it doesn't damage your primary domain.
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