Ask HN: Dealing with "blocked" emails after DNS issue

4•nvahalik•3mo ago

A couple of weeks ago, my root DNS server for my personal domain went offline (due to my own fault).

It took me a couple of days to figure out... and now I'm getting messaging that my email is "broken" across a number of sites a few that even refusing to email me even though my DNS is fixed.

Is there any recourse here?

It sounds like the answer is "no, there isn't any recourse because this is sender-specific". In my case (e.g.) SendGrid needs me to be whitelisted again.

Comments

sybercecurity•3mo ago

Might be negative caching going on at the sender side. If they can't get a response, they set a TTL on the lack of a response - so future queries don't time out but instead immediately return NXDOMAIN. If you immediately tried after restarting your DNS service, it might still be assuming the server is down. Does it still do that after waiting? Like 12-24 hours?

nvahalik•3mo ago

So interestingly... I went back to LinkedIn just a little while ago and there was a different message "mark as working" which I didn't see before.

For another provider, I was told I had to contact support as I had been "blacklisted" by Sendgrid and they had to issue a request to unblacklist me.

Queueing Theory v2: DORA metrics, queue-of-queues, chi-alpha-beta-sigma notation

Show HN: Hibana – choreography-first protocol safety for Rust

Haniri: A live autonomous world where AI agents survive or collapse

GPT-5.3-Codex System Card [pdf]

Atlas: Manage your database schema as code

Geist Pixel

Show HN: MCP to get latest dependency package and tool versions

The better you get at something, the harder it becomes to do

Show HN: WP Float – Archive WordPress blogs to free static hosting

Show HN: I Hacked My Family's Meal Planning with an App

Sony BMG copy protection rootkit scandal

The Future of Systems

NASA now allowing astronauts to bring their smartphones on space missions

Claude Code Is the Inflection Point

Show HN: MicroClaw – Agentic AI Assistant for Telegram, Built in Rust

Show HN: Omni-BLAS – 4x faster matrix multiplication via Monte Carlo sampling

The AI-Ready Software Developer: Conclusion – Same Game, Different Dice

AI Agent Automates Google Stock Analysis from Financial Reports

Voxtral Realtime 4B Pure C Implementation

I Was Trapped in Chinese Mafia Crypto Slavery [video]

U.S. CBP Reported Employee Arrests (FY2020 – FYTD)

Show HN: I built a free UCP checker – see if AI agents can find your store

Show HN: SVGV – A Real-Time Vector Video Format for Budget Hardware

Study of 150 developers shows AI generated code no harder to maintain long term

Spotify now requires premium accounts for developer mode API access

When Albert Einstein Moved to Princeton

Agents.md as a Dark Signal

System time, clocks, and their syncing in macOS

McCLIM and 7GUIs – Part 1: The Counter

So whats the next word, then? Almost-no-math intro to transformer models