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Linux
Postfix Sender Relay Maps Need a Warning-Safe Preflight
A malformed sender-relay row produced an uncomfortable result in the lab: postmap exited with status zero, created a database, and still warned…
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Postfix.
Practical guides, fresh perspectives and technical know-how from Voxfor.
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3 articlesArticles & guides
Security
DKIM Key Rotation Needs Two Selectors, Not a DNS Swap
A safe DKIM key rotation is an overlap between two selector names, not an in-place replacement of one DNS value. Publish and…
Linux
Postfix Mail Queue Triage: Diagnose Delays Before Retrying
A growing Postfix queue is evidence, not a command to flush everything. The safe response is to capture the queue shape, follow…
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