Software meets hardware.
Code, circuits, hydraulics, and the things that connect them.
Projects and practical notes by Jon.
From the workbench
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Gmail’s Smaller Web Inbox: Why Gradual Feature Cuts Can Push Users Away
Gmail is ending web features for third-party email accounts in January 2027. What the change means, what remains available, and why gradual feature cuts can erode trust.
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Back Up, Update, and Recover a Mailcow Server
Commands and a recovery plan for backing up Mailcow, updating it safely, and restoring after server loss.
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Create Your First Mailcow Mailbox, Stop Abuse, and Test Delivery
Create a mailbox, secure it against spam abuse, check DNS and TLS, test both directions, and plan MX cutover.
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Send Mailcow Mail Through Oracle Cloud Email Delivery
Set up a least-privilege OCI SMTP identity and connect Mailcow to an authenticated outbound relay.
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Configure Route 53 DNS for Mailcow: MX, SPF, DKIM, DMARC, and PTR
A plain-English Route 53 guide to mail routing and sender authentication, with safe migration notes.