Hacker News: c0nrad

Email Bulk Sender Requirements (Google/Yahoo /Microsoft) [video]

c0nrad — Wed, 05 Aug 2026 14:14:34 +0000

Article URL: https://www.youtube.com/watch?v=TRwAO0Td_qA

Comments URL: https://news.ycombinator.com/item?id=49183231

Points: 2

# Comments: 1

Levels of Email Authentication Maturity

c0nrad — Wed, 24 Jun 2026 15:20:56 +0000

Article URL: https://dmarcdefender.io/docs/dmarc-maturity

Comments URL: https://news.ycombinator.com/item?id=48661320

Points: 3

# Comments: 0

New comment by c0nrad in "Ask HN: Entrepreneurs, how long did it take you to succeed?"

c0nrad — Thu, 28 May 2026 21:10:28 +0000

First company was csper.io (2019), took maybe 3 months till I had my first customer, and then around month 6 I started getting ~1 customer/week, and continued scaling after that. Felt pretty comfortable with the idea and didn't need to pivot/drop.

Second/current one, dmarcdefender.io (2025), took maybe 6 months till I had my first customer, but now it's growing much slower. There's a lot more competition and still trying to figure out where I fit in / how to market it among all the competition. I was originally positioned as a security focused product, but now pivoting to more of a marketing/deliverability product. But to be honest not really sure where it's going, but still fighting the fight.

New comment by c0nrad in "Show HN: Domain DMARC Checker"

c0nrad — Wed, 27 May 2026 11:23:17 +0000

Thanks for the feedback! The domain checker tool is completely free and unrelated to the subscription. The subscription is for dmarc monitoring (I collect the dmarc aggregation reports and provide insights). I'll see if I can make that more clear.

Show HN: Domain DMARC Checker

c0nrad — Fri, 15 May 2026 09:57:35 +0000

Article URL: https://dmarcdefender.io/tools/domain-check

Comments URL: https://news.ycombinator.com/item?id=48146660

Points: 6

# Comments: 2

New comment by c0nrad in "Ask HN: What Are You Working On? (April 2026)"

c0nrad — Mon, 13 Apr 2026 13:01:09 +0000

https://dmarcdefender.io. DMARC service focused on api/integrations. Currently thinking about (1) writing an ml classifier to classify sources, and (2) using rag to automatically generate spf/dkim fix advice for different sources.

New comment by c0nrad in "Ask HN: What are you working on? (February 2026)"

c0nrad — Mon, 09 Feb 2026 12:31:28 +0000

Two free dmarc tools: * dmarc domain scanner https://dmarcdefender.io/tools/domain-check * dmarc xml analyzer: https://dmarcdefender.io/tools/xml-analyzer

New comment by c0nrad in "Ask HN: What are you working on? (January 2026)"

c0nrad — Sun, 11 Jan 2026 18:31:35 +0000

https://battlecode.org/ is in January, I look forward to it every year.

New comment by c0nrad in "Ask HN: What Are You Working On? (Nov 2025)"

c0nrad — Mon, 10 Nov 2025 12:27:17 +0000

Building a cheaper DMARC service with no ssotax. https://dmarcdefender.io

New comment by c0nrad in "Ask HN: What Are You Working On? (June 2025)"

c0nrad — Sun, 29 Jun 2025 22:01:12 +0000

Base health counter for Star Wars Unlimited https://blog.c0nrad.io/posts/swu-health-counter/

ROPing from a Macro Expansion; pwn/smal-arey CakeCTF 2022 [video]

c0nrad — Thu, 27 Feb 2025 10:36:15 +0000

Article URL: https://www.youtube.com/watch?v=O08PK3eTXts

Comments URL: https://news.ycombinator.com/item?id=43193096

Points: 1

# Comments: 0

New comment by c0nrad in "Ask HN: Could you share your personal blog here?"

c0nrad — Wed, 05 Jul 2023 00:46:42 +0000

I do security Capture The Flag (CTF) writeups on YouTube. It's been fun, I've learned a lot, just published my 100th video.

https://youtube.com/@SloppyJoePirates

New comment by c0nrad in "DiceCTF 2023 Security Challenge Writeups [video]"

c0nrad — Wed, 08 Feb 2023 18:46:25 +0000

Not sure if this is interesting to the HN crowd, but some challenge writeups from a recent security Capture the Flag competition.

DiceCTF 2023 Security Challenge Writeups [video]

c0nrad — Wed, 08 Feb 2023 18:46:25 +0000

Article URL: https://www.youtube.com/watch?v=0hC-7u_JSzE&list=PLUj83tCk_iA3TkyHd1pDdYRIjTpkp96mA

Comments URL: https://news.ycombinator.com/item?id=34712751

Points: 1

# Comments: 1

New comment by c0nrad in "Ask HN: Developers who switched careers, what are you doing now?"

c0nrad — Sun, 20 Mar 2022 16:08:53 +0000

Going back to school for Physics (age 30). It'd be cool to understand why the universe exists before I die.

Ask HN: How to Price a Slack App

c0nrad — Sun, 17 Oct 2021 15:41:58 +0000

We recently released our first Slack App (https://slacklatex.com/) and we're trying to understand the best way to structure pricing.

I think the options are:

  1. $ / month
  2. $ / user / month
  3. $ / active user / month
  4. $ / api call / month

But I'm not sure how to evaluate which is best. (Nor am I even sure what the criteria for best even is)

If anyone has any experience pricing slack apps (or know of any resources), I'd really appreciate any insight. (My email is in bio if that's preferred)

Comments URL: https://news.ycombinator.com/item?id=28897245

Points: 16

# Comments: 5

New comment by c0nrad in "Slack LaTeX"

c0nrad — Wed, 13 Oct 2021 13:31:39 +0000

Ah thanks for the heads up. We'll wrap it in a html picture block. (Google's https://web.dev/measure/ recommends webp, but I should have done more research)

New comment by c0nrad in "Slack LaTeX"

c0nrad — Wed, 13 Oct 2021 13:29:15 +0000

Thanks for the insight!

New comment by c0nrad in "Slack LaTeX"

c0nrad — Wed, 13 Oct 2021 02:20:50 +0000

> Interesting article. How much requests can you support for 20/month before losing money with this stack?

Ha, I haven't profiled it yet. I'm not too sure. But, I think a decent amount. If a slack team with 10000+ physicists signs up, I may need to talk to them offline.

I do plan on doing some stress testing in the future for fun, I'll try to remember to reply here.

> partner frontend

Yep, to repeat what steve_adams_86 said, she did the frontend completely. Usually I'm forced to do the frontend, it was very nice having someone else just do the whole thing without me.

New comment by c0nrad in "Slack LaTeX"

c0nrad — Wed, 13 Oct 2021 01:52:38 +0000

Disclosure: I used to work at MongoDB, left 2 years ago.

True, it probably would have made sense to stay completely within AWS. If I didn't know MongoDB very well, I would have used DynamoDB.

But I know MongoDB well, and MongoDB Atlas (the hosted platform) also has a free tier, and it's hosted in ec2, and you can setup VPC peering (so network speed _should_ be comparable to dynamo, but not sure).

Also, Atlas (MongoDB's Cloud Platform) has a really nice "charts" product (sort of like a built in web based tableau) which I use for my internal dashboards (it takes <5 minutes to setup, for stuff like "how many customers do I have", "at what stage in the pipeline are they", "how many renders does each customer average", etc), and they have a nice web based "query explorer", which I randomly use when debugging something, when I don't feel like connecting with terminal.

But yeah, if I wasn't already biased, I would have used DynamoDB.