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Inbound SMTP DANE (DNS-Based Authentication of Named Entities) is a security protocol designed to secure email communication by ensuring the authenticity of the receiving mail server’s encryption certificates when emails are delivered via the Simple Mail Transfer Protocol (SMTP).
By default, SMTP doesn’t guarantee encryption, which makes it vulnerable to man-in-the-middle attacks. To secure email communication, SMTP can use STARTTLS, which upgrades a plain text connection to an encrypted one. However, STARTTLS by itself doesn’t verify the authenticity of the receiving mail server’s certificate, leaving it vulnerable to attacks where a malicious entity might impersonate the server.
DANE addresses this issue by enabling domain owners to publish their mail server’s encryption certificates in DNS records, which are protected by DNSSEC (Domain Name System Security Extensions). This allows sending mail servers to verify the authenticity of the receiving mail server’s certificate before establishing an encrypted connection.
When an email is received, the receiving mail server uses DANE to publish its certificate in the DNS, allowing the sending server to check the certificate’s validity before establishing a secure TLS connection. This ensures that emails are delivered over an encrypted connection and that the encryption certificate is trustworthy and has not been tampered with.
https://www.cswrld.com/2024/09/how-to-turn-on-inbound-smtp-dane-in-office-365/
#smtp #dane #inbound #office365 #exchangeonline #dnssec #cswrld
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Bon les admin-sys de masto, j'ai besoin d'aide. Mon serveur mail est inaccessible, je voudrais avoir un serveur de backup SMTP.
Est-ce que vous avez des conseils pour mettre ça en place?
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@bobwyman @davew Generally, developers aren't immediately concerned about, entity relationships and entity relationship type semantics. Hence the issue of not recognizing conceptual common ground during the early stages of solution development -- or tweaking retrospectively.
In addition, there are situations where protocols are the delineation drivers e.g., #SMTP, #IMAP4, and #POP when looking at #UI/#UX layering over in- and out-boxes 😀
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Open SMTPd v7.7.0p0 has been released! 🙌 🎉
#SMTP #OpenSMTPd #OpenSource #POSIX #programming #BSD #freeBSD #ghostBSD #openBSD #Linux
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SMT Part Counter Aims to Ease Taking Inventory - [Nick Poole] has an interesting idea for a new tool, one that has the simple goal ... - https://hackaday.com/2022/04/20/smt-part-counter-aims-to-ease-taking-inventory/ #kitproduction #crowdfunding #crowdsupply #toolhacks #inventory #7segment #smtreel #smttape #tools
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This Pogo Pin Test Fixture Keep Your SMDs from Taking Flight - There’s no denying how useful surface mount technology is, and how enabling the ab... - https://hackaday.com/2023/12/05/this-pogo-pin-test-fixture-keep-your-smds-from-taking-flight/ #surfacemount #testficture #toolhacks #pogopins #test #lcr #smd #smt
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Умножение матриц и SMT – почему бы и нет?
Привет, Хабр! Меня зовут Евгений Буевич, я работаю в Рунити. Как-то раз у меня возникла непреодолимая потребность умножать матрицы определенного размера, смотреть, что получится и умножать опять до тех пор, пока что-нибудь не получится. Остановился на BLIS, скомпилировал, подключил, и было мне счастье. Матрицы стали подрастать в числе и размере, скорость процесса, как ей и положено, падала в кубе от размера и кратно от числа. В конце концов стало ощущаться, что на ЦПУ 486,4 GFLOPS и ни флопсом больше, а замеры показывали, что на самом деле их около 350.
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📧🔒 Enhancing Email Automation with SSL in Python 🔒📧
💡🚀 Boost your Python email game with SSL encryption! 🚀💡
🔍 Dive into the world of secure email transmission with SSL and Python! Learn how to send bulk emails effortlessly while ensuring top-notch security. Check out the full article:
https://denizhalil.com/2024/02/21/send-email-python-yandex-smtp/
#smtp #pythonprogramming #python #ssl #sslcertificate #email
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Welcome to the shop…
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#curl --ssl-reqd --user '[email protected]:pwd' --mail-from '[email protected]' --mail-rcpt '[email protected]' -H 'From: [email protected]' -H 'To: [email protected]' -H 'Subject: test' -F '=<body.txt;encoder=quoted-printable' --url smtp://smtp.ionos.it:587
#smtp request is delivered to receiver address but not saved to the Sent folder: does #IONOS #email require additional #headers ?
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Readings shared February 25, 2025. https://jaalonso.github.io/vestigium/posts/2025/02/25-readings_shared_02-25-25 #Coq #ITP #LLMs #LeanProver #Logic #Math #PhDThesis #Rocq #SAT #SMT
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Fail of the Week: Hackaday Writer Attempts XBox Repair - Like a lot of Hackaday readers, I pride myself on being “the fix-it guy” in my fam... - https://hackaday.com/2021/12/08/fail-of-the-week-hackaday-writer-attempts-xbox-repair/ #hackadaycolumns #failoftheweek #hotairstation #repair #rework #xbox #smd #smt
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New blog post!
☆RAIDOU Remastered: The Mystery of the Soulless Army, first impressions☆
Fair warning, rated T for Teen, you know the drill.
Let me just start with this: I loved this game on PS2(...) https://blog.bluestarcreations.net/blues-reviews/raidou-remastered-the-mystery-of-the-soulless-army-first-impressions/#BluesReviews #ActionRPG #ARPG #DevilSummoner #FirstImpressions #games #gaming #JRPG #MegaTen #PS4 #PS5 #RaidouRemastered #RatedTForTeen #RPG #ShinMegamiTensei #SMT
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ESBMC - An Efficient SMT-based Bounded Model Checker
https://ssvlab.github.io/esbmc/
"ESBMC is an open-source, [...], context-bounded model checker based on satisfiability modulo theories for verifying single- and multi-threaded C/C++ programs. It does not require the user to annotate the programs with pre- or postconditions, but allows the user to state additional properties using assert-statements, that are then checked as well."
1/3
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Any email experts know which certificate authorities are generally considered trusted for the purposes of MTA-STS validation? RFC8461 says: "It is expected that Sending MTAs use a set of trusted CAs similar to those in widely deployed web browsers and operating systems." Web browsers publish the list of CAs they trust, but I don't see equivalent docs for gmail and others.
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SMTP MTA Strict Transport Security (MTA-STS) is a relatively young protocol that allows you to signal the use of trusted certificates when encrypting electronic mail during SMTP transmission.
The transmission of electronic mail uses so-called opportunistic encryption. The client side connects to the server, notifies the server of its intention to encrypt the communication using STARTTLS and establishes an anonymous TLS connection, i.e. without authenticating the identity of the counterparty. If anything goes wrong at the beginning of the communication, the client switches to the backup plan and the mail is transmitted unencrypted.
The RFC even explicitly states that encryption must not be enforced for the sake of interoperability between servers. That is the reason why we have MTA-STS that is somewhat similar to HSTS in the HTTPS world. And Exchange Online in Office 365 supports MTA-STS for incoming and also outgoing emails. It just needs to be configured.
Learn how to configure MTA-STS for Office 365 from my today's blog post https://www.cswrld.com/2024/04/how-to-enable-mta-sts-in-office-365/
#mtasts #smtp #email #office365 #exchangeonline #cybersecurity #tips
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Has the world forgotten once again that mbox has not been an "it" since MMDF and S5R4 came along in the 1980s? "They" is the correct pronoun.
And the dots were #SMTP, not mbox.
http://jdebp.info/FGA/mail-mbox-formats.html
http://qmail.org/man/man5/mbox.html
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When I first heard #GotTheBeat's "Stamp On It," I enjoyed it, but definitely at the time felt that "Step Back" was the stronger overall single.
Now? I prefer "Stamp On It," a lot. However, I still think Goddess Level should have been the lead single off that mini-album.
Anyways, here's "Stamp On It." https://www.youtube.com/watch?v=likYKQXBLbw
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Even though the article only mentions Ubuntu and Debian, it does work on Fedora on my Framework Laptop 16
ServeTheHome: A Guide to Quickly Enable and Disable SMT and Hyper-Threading on Ubuntu and Debian
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Then she won Show Me the Money S11 in 2022 on the Jay Park X Slom team and was the first girlie to win that show.
Woo! These two tracks are when started paying attention, because they're fire. (And cameo from my beloved So!YoON!
[#SMTM11/8회] ♬ NOT SORRY (Feat. pH-1) (Prod. by Slom) - 이영지 @본선 #쇼미더머니11 EP.8 | Mnet 221216 방송
https://www.youtube.com/watch?v=dp8fgSykQZQ[#SMTM11/풀버전] ♬ WITCH (Feat. 박재범, So!YoON!) (Prod. by Slom) - 이영지 @세미파이널 #쇼미더머니11 EP.9
https://www.youtube.com/watch?v=GXFZlveklwQ -
I‘ve just blogged about if HCL Notes/Domino is impacted by #SMTP smuggling
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@brokenix Heads-up to all: The IETF has proposed implicit TLS (Port 465) as preferred over STARTTLS solutions. The previous confusion around Port 465 was cleared.
https://www.rfc-editor.org/rfc/rfc8314.html#section-3.3
Wherever possible I use Port 465 over 587. Only one mail server I use doesn't offer implicit TLS, I have to contact them soon 😀
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Ich hab bisher mit Domain-B (nicht bei Ionos) Domain-A (bei Ionos) als #SMTP #Smarthost benutzt.
Aber #Ionos macht das ab Ende Januar dicht 🥺
Werde jetzt wohl doch vorzeitig Domain-B zu Ionos umziehen 🙃Wie macht ihr anderen die selbst #EMail machen das denn? Habt ihr alle bei $Provider nen vServer und versendet mit dem eigenen SMTP Server direkt, statt nen Zwischen-Hop über nen Großen einzubauen?
Oder gibts hier noch andere Leute die einen #Smarthost Dienst für ausgehendes verwenden? -
The approximately four generations deprecated VM that handles my email is finally being killed off by my ISP, and I can't really say that I blame them. I have about a month to find a new email provider for #SMTP and #IMAP. No, I'm not going to host it myself again. Suggestions? So far #Fastmail looks like it's not complete and utter dogshit although obviously it will never be as capable as my tangled mess of custom #exim and #procmail.
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Well, this may be a first for me... I just received, on October 17, a bounce for an email message which my system sent on August 19.
It was an automated DMARC aggregate report email, and therefore there's a good chance the system it was sent to belongs to a spammer and therefore weird behavior from it would not be surprising, but still, bouncing a message after two months is pretty darn weird.
#smtp #sysadmin #mailHosting #mailServer #DMARC
