Friday, May 15, 2026

OpenSMTPD Is The Mail Server For The Future

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Image credit: the OpenSMTPD project © 2026 Peter N. M. Hansteen The SMTP mail server for the 21st century and onwards is Op...
Saturday, April 25, 2026

The implementation of the Carrier Pigeon Internet Protocol, RFC1149, 25 years later

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© 2005, 2026 Peter N. M. Hansteen Historical note: We implemented the Carrier Pigeon Internet Protocol, RFC1149 , with the f...
Friday, March 6, 2026

The Book of PF, 4th Edition: It's Here, It's Real

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© 2026 Peter N. M. Hansteen The long wait is over. Fresh copies of The Book of PF, 4th Edition arrived here today. Which m...
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Sunday, February 1, 2026

The Rest Is Trash

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© 2026 Peter N. M. Hansteen We are now halfway through the nineteenth year of greytrapping, still tracking and collecting from the w...
Thursday, January 8, 2026

A Major Mail Provider Demonstrate They Likely Do Not Understand Mail At All

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© 2026 Peter N. M. Hansteen So it happened again. A major mail provider proved that they do not, in fact, understand how modern emai...
Sunday, December 28, 2025

Why 451 is Good for You - Greylisting Perspectives From the Early Noughties

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© 2025 Peter N. M. Hansteen A software vendor was using SMTP spamware to send license keys customers had paid thousands for. A measured r...
Friday, November 28, 2025

A Bus Ride and the (At Least) 3x UX FAILs

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© 2025 Peter N. M. Hansteen Norway is digital to a fault. That is why attempting to buy the ticket for a bus ride can reveal a casc...