// blog
Field notes from operations.
Engineering perspective on email infrastructure — protocol changes, regulatory shifts, post-mortems, vendor analysis. Written by the operators, for the operators. No marketing.
01 / All posts
Recent writing.
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DKIM key rotation playbook for 2026
The procedure looks simple — generate a new key pair, publish on a new selector, configure the MTA. Three steps. Here is what actually goes wrong, and the operational sequence that prevents it.
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