@Schack profile picture
Henrik Schack @Schack

Working with DMARC, Python, MySQL, Linux, Cloudflare GPG: 0B517CD2

Joined January 2007
  • Tweets 3,885
  • Following 742
  • Followers 567
129 Photos and videos
Pinned Tweet
Henrik Schack@Schack
16 Sep 2017
How long do you delay applying security patches? Hours/weeks/months? If you haven't deployed #DMARC you're 5 YEARS late on email #security
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Henrik Schack@Schack
19 Sep 2025
Hey @FSecure , your #SPF record needs some love. dmarcian.com/spf-survey/?dom… Tip: Remove some of the includes unrelated to SPF

SPF Surveyor - dmarcian

dmarcian's SPF Surveyor is an SPF diagnostic tool that presents a graphical view of SPF records. Discover any problems with your SPF record.

dmarcian.com
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Henrik Schack@Schack
16 Sep 2025
Sig nej til Hummelgaards Stasi samfund. borgerforslag.dk/se-og-stoet…

Nej til EU’s “Masseovervågning” beskyt vores privatliv, digitale sikkerhed og ytringsfrihed.

Vi beder Danmark om at stemme nej til EU’s “Chatkontrol” en lov, der pålægger masseovervågning af alle borgere ved at scanne private beskeder, e-mails

borgerforslag.dk
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Hey @grafana Your #SPF record needs some attention dmarcian.com/spf-survey/?dom…

SPF Surveyor - dmarcian

dmarcian's SPF Surveyor is an SPF diagnostic tool that presents a graphical view of SPF records. Discover any problems with your SPF record.

dmarcian.com
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Henrik Schack@Schack
11 Jul 2025
Oh, did the dnsbycomodo[.]net domain just expire ? #dns
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Henrik Schack@Schack
11 Jul 2025
whois.com/whois/dnsbycomodo.…

Whois dnsbycomodo.net

Whois Lookup for dnsbycomodo.net

whois.com
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Zendesk customer? Let's get BIMI support for Zendesk generated email support.zendesk.com/hc/en-us… #BIMI

BIMI Selector | The place for Zendesk users to come together and share

HiIt would be great if it were possible to configure a BIMI selector for outgoing email.It would require adding a custom SMTP  header to all outgoing email.Here is an example:From: support@example....

community.zendesk.com
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Henrik Schack@Schack
24 Sep 2024
Hej @KMDIT Jeres #SPF record er gået i stykker. dmarcian.com/spf-survey/?dom… TIP: Fjern includes som ikke er relevante for SPF.

SPF Surveyor - dmarcian

dmarcian's SPF Surveyor is an SPF diagnostic tool that presents a graphical view of SPF records. Discover any problems with your SPF record.

dmarcian.com
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Henrik Schack@Schack
17 Jul 2024
Ak, et firma der anbefaler email konfiguration der ligner phishing defgo.com/help/da/default.as…
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Henrik Schack@Schack
29 Jun 2024
Mere af den slags nyheder.tv2.dk/samfund/2024-…

Kommune sletter alle Facebooksider

nyheder.tv2.dk
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Henrik Schack@Schack
23 Feb 2024
Is it just me, or is "mx1-4.smtp.goog" unreachable from quite a few places?
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Henrik Schack@Schack
22 Feb 2024
Ups @NetsDanmark jeres #SPF record er gået i stykker igen. dmarcian.com/spf-survey/?dom… Tip: Der er stor forskel for SPF og Sender ID, i har en masse skrammel i jeres SPF record som ikke har noget med SPF at gøre.

SPF Surveyor - dmarcian

dmarcian's SPF Surveyor is an SPF diagnostic tool that presents a graphical view of SPF records. Discover any problems with your SPF record.

dmarcian.com
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Henrik Schack retweeted
OrbStack
@OrbStack
2 Feb 2024
OrbStack 1.4 is here! 🚨 Security fixes ✨ New UI design to show more info ✅ Several requested features (shell completions, custom machine usernames, etc.) docs.orbstack.dev/release-no…
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Henrik Schack@Schack
18 Sep 2023
Hej @Reg_Nord Jeres #SPF record trænger til lidt kærlighed dmarcian.com/spf-survey/?dom… Tip: ip4 ikke ipv4

SPF Surveyor - dmarcian

dmarcian's SPF Surveyor is an SPF diagnostic tool that presents a graphical view of SPF records. Discover any problems with your SPF record.

dmarcian.com
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Hi @LastPass You should fix your #SPF record dmarcian.com/spf-survey/?dom…

SPF Surveyor - dmarcian

dmarcian's SPF Surveyor is an SPF diagnostic tool that presents a graphical view of SPF records. Discover any problems with your SPF record.

dmarcian.com
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Henrik Schack@Schack
29 Aug 2023
Så har man fået ødelagt sin #SPF record godt og grundigt dmarcian.com/spf-survey/?dom…
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Henrik Schack@Schack
26 Jul 2023
Hej @NetsDanmark Jeres #SPF record er gået lidt i stykker dmarcian.com/spf-survey/?dom…

SPF Surveyor - dmarcian

dmarcian's SPF Surveyor is an SPF diagnostic tool that presents a graphical view of SPF records. Discover any problems with your SPF record.

dmarcian.com
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Henrik Schack@Schack
17 Jun 2023
Hackerstop, nu 80 dage med en smadret #SPF record. dmarcian.com/spf-survey/?dom…
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Henrik Schack retweeted
Concordium
@Concordium
24 May 2023
MitID integration is live for Danish users and soon we will roll out integrations for Sweden, Finland and Norway🌍 🧵In this thread we break down our role in the digital identification arena & our compatibility with future European ID schemes  1/5
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Så er de sidste nye firmaer som har fået D-Mærket tilføjet til status.dmarc.dk/ Og nej, de har ikke styr på email sikkerhed. #DMARC

Email sikkerheds status

Hvem beskytter dig mod falske emails/phishing ved hjælp af DMARC? Her kan du se status på en række udvalgte domæner.

status.dmarc.dk
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Henrik Schack@Schack
30 Mar 2023
Suk !
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