God I fucking hate postfix notation. As if maths wasn't unreadable enough already.
November 9, 2026 at 4:39 PM
God I fucking hate postfix notation. As if maths wasn't unreadable enough already.
Effortlessly Configure #Postfix MTA for Use with #Mastodon (Effortless 5 Minute Guide) This article describes how to configure Postfix MTA for use with Mastodon server. Admins who self-host their Mastodon ...
Continued 👉 #mailtransferagent #selfhosting #mailserver #selfhosted #mailrelay #opensource
Continued 👉 #mailtransferagent #selfhosting #mailserver #selfhosted #mailrelay #opensource
Effortlessly Configure Postfix MTA for Use with Mastodon (Effortless 5 Minute Guide)
blog.radwebhosting.com
November 10, 2026 at 5:28 AM
Effortlessly Configure #Postfix MTA for Use with #Mastodon (Effortless 5 Minute Guide) This article describes how to configure Postfix MTA for use with Mastodon server. Admins who self-host their Mastodon ...
Continued 👉 #mailtransferagent #selfhosting #mailserver #selfhosted #mailrelay #opensource
Continued 👉 #mailtransferagent #selfhosting #mailserver #selfhosted #mailrelay #opensource
A single trailing space in my PTR record blackholed every email to Outlook for a week. https://www.valtersit.com/guides/hosting/self-hosted-email-with-postfix-and-dovecot-honest-sysadmin/
Self-Hosted Email with Postfix and Dovecot: Honest Sysadmin's Guide
www.valtersit.com
November 6, 2026 at 7:30 PM
A single trailing space in my PTR record blackholed every email to Outlook for a week. https://www.valtersit.com/guides/hosting/self-hosted-email-with-postfix-and-dovecot-honest-sysadmin/
Fair! I will say that in my day to day I wouldn't use postfix for the same reason, but I am glad to at least know HOW it works, even if it would take me a while to use, lol
November 9, 2026 at 5:34 PM
Fair! I will say that in my day to day I wouldn't use postfix for the same reason, but I am glad to at least know HOW it works, even if it would take me a while to use, lol
Configure Postfix to relay outbound mail via Microsoft 365 using smtp.office365.com:587 with SASL PLAIN, STARTTLS, and TLS pinning against the system CA store. https://www.valtersit.com/vault/relay-mail-through-microsoft-365-with-postfix-connector-and--75e265/
Relay mail through Microsoft 365 with Postfix connector and TLS pinning
www.valtersit.com
November 7, 2026 at 10:20 PM
Configure Postfix to relay outbound mail via Microsoft 365 using smtp.office365.com:587 with SASL PLAIN, STARTTLS, and TLS pinning against the system CA store. https://www.valtersit.com/vault/relay-mail-through-microsoft-365-with-postfix-connector-and--75e265/
Postfix queue growing past a few hundred messages usually means a downstream problem. This beginner script (237 lines) watches queue size and pings you via ntfy when it stays high. #python #infra #postfix https://www.valtersit.com/python/postfix-mail-queue-monitor-and-alerter/
Postfix Mail Queue Monitor and Alerter
www.valtersit.com
November 6, 2026 at 3:00 AM
Postfix queue growing past a few hundred messages usually means a downstream problem. This beginner script (237 lines) watches queue size and pings you via ntfy when it stays high. #python #infra #postfix https://www.valtersit.com/python/postfix-mail-queue-monitor-and-alerter/
All projects are a few clicks away, and I have a small library of convenience functions, like pt(x,y) which returns a CGPoint, and the ° postfix operator, to turn a number in an Angle(degrees:).
No need to make things harder by hiding examples you know well…
No need to make things harder by hiding examples you know well…
November 8, 2026 at 5:08 AM
All projects are a few clicks away, and I have a small library of convenience functions, like pt(x,y) which returns a CGPoint, and the ° postfix operator, to turn a number in an Angle(degrees:).
No need to make things harder by hiding examples you know well…
No need to make things harder by hiding examples you know well…
A l'UNSA nous étudiant, en 94, nous avions déjà tous une messagerie. A l'IRD également, ils avaient une messagerie.
Et même si tous ne l'avais au CNRS, rien n'empêcher de créer serveur libres, postfix et procmail était déjà d'actualité.
Et même si tous ne l'avais au CNRS, rien n'empêcher de créer serveur libres, postfix et procmail était déjà d'actualité.
November 8, 2026 at 12:54 PM
A l'UNSA nous étudiant, en 94, nous avions déjà tous une messagerie. A l'IRD également, ils avaient une messagerie.
Et même si tous ne l'avais au CNRS, rien n'empêcher de créer serveur libres, postfix et procmail était déjà d'actualité.
Et même si tous ne l'avais au CNRS, rien n'empêcher de créer serveur libres, postfix et procmail était déjà d'actualité.
🚀 Deploy #Virtualmin on #AlmaLinux #VPS (5 Minute Quick-Start Guide)
This article provides a how-to guide to deploy Virtualmin on AlmaLinux VPS.
What is ...
Continued 👉 #controlpanel #certbot #dovecot #bind #phpfpm #postfix #selfhosting #selfhosted #letsencrypt #spamassassin #clamav #mariadb
This article provides a how-to guide to deploy Virtualmin on AlmaLinux VPS.
What is ...
Continued 👉 #controlpanel #certbot #dovecot #bind #phpfpm #postfix #selfhosting #selfhosted #letsencrypt #spamassassin #clamav #mariadb
🚀 Deploy Virtualmin on AlmaLinux VPS (5 Minute Quick-Start Guide)
blog.radwebhosting.com
November 9, 2026 at 12:30 AM
🚀 Deploy #Virtualmin on #AlmaLinux #VPS (5 Minute Quick-Start Guide)
This article provides a how-to guide to deploy Virtualmin on AlmaLinux VPS.
What is ...
Continued 👉 #controlpanel #certbot #dovecot #bind #phpfpm #postfix #selfhosting #selfhosted #letsencrypt #spamassassin #clamav #mariadb
This article provides a how-to guide to deploy Virtualmin on AlmaLinux VPS.
What is ...
Continued 👉 #controlpanel #certbot #dovecot #bind #phpfpm #postfix #selfhosting #selfhosted #letsencrypt #spamassassin #clamav #mariadb
Външните проверки хванаха грешна SNI конфигурация в Postfix: пощата показваше грешен сертификат. Как следим сайтове и сървъри:
https://webcoma.dev/bg/blog/kak-sledim-saytove-i-sarvari/?utm_source=bluesky&utm_medium=social&utm_campaign=blog-kak-sledim-saytove-i-sarvari
https://webcoma.dev/bg/blog/kak-sledim-saytove-i-sarvari/?utm_source=bluesky&utm_medium=social&utm_campaign=blog-kak-sledim-saytove-i-sarvari
November 6, 2026 at 7:30 AM
Външните проверки хванаха грешна SNI конфигурация в Postfix: пощата показваше грешен сертификат. Как следим сайтове и сървъри:
https://webcoma.dev/bg/blog/kak-sledim-saytove-i-sarvari/?utm_source=bluesky&utm_medium=social&utm_campaign=blog-kak-sledim-saytove-i-sarvari
https://webcoma.dev/bg/blog/kak-sledim-saytove-i-sarvari/?utm_source=bluesky&utm_medium=social&utm_campaign=blog-kak-sledim-saytove-i-sarvari
Exactly! If you use RPN, there's no need to deal with order of operations.
(2+3)*4 and 2+3*4 look very similar with infix notation, but have different results. With postfix notation, they become 2 3 + 4 * and 2 3 4 * +. No parentheses, the order of the operations is the order they come up.
(2+3)*4 and 2+3*4 look very similar with infix notation, but have different results. With postfix notation, they become 2 3 + 4 * and 2 3 4 * +. No parentheses, the order of the operations is the order they come up.
November 10, 2026 at 5:34 AM
Exactly! If you use RPN, there's no need to deal with order of operations.
(2+3)*4 and 2+3*4 look very similar with infix notation, but have different results. With postfix notation, they become 2 3 + 4 * and 2 3 4 * +. No parentheses, the order of the operations is the order they come up.
(2+3)*4 and 2+3*4 look very similar with infix notation, but have different results. With postfix notation, they become 2 3 + 4 * and 2 3 4 * +. No parentheses, the order of the operations is the order they come up.
The best notation for substitution application is postfix notation.
November 4, 2026 at 11:50 PM
The best notation for substitution application is postfix notation.
Word of the Hour: Postfix - To annex; specifically (Gram.) to add or annex as a letter syllable or word to the end of another or principal word; to suffix. #WordOfTheHour #WordOfTheDay
November 8, 2026 at 8:00 AM
Word of the Hour: Postfix - To annex; specifically (Gram.) to add or annex as a letter syllable or word to the end of another or principal word; to suffix. #WordOfTheHour #WordOfTheDay
Bypass VPS SMTP Restrictions with Postfix and Resend API
Bypass VPS SMTP Port Restrictions with Postfix and Resend API — Keep Using Outlook Without Changing Its Settings
blastar.biz
November 4, 2026 at 5:33 PM
Bypass VPS SMTP Restrictions with Postfix and Resend API
Linux環境でWebサーバーやWordPressを運用していると、メール送信・通知用としてPostfixを稼働させているケースは非常に多いはずです。ある日、何気なくサーバーの状態を確認しようと mailq を叩いた瞬間 […]
【Postfix】スパム・不正中継の試行を静かに虚空へ葬る！DISCARDによる即時破棄とキュー肥大化防止ガイド
Linux環境でWebサーバーやWordPressを運用していると、メール送信・通知用としてPostfixを稼働させているケースは非常に多いはずです。ある日、何気なくサーバーの状態を確認しようと mailq を叩いた瞬間 […]
tech.nanka-yoshi.com
November 9, 2026 at 2:00 AM
Linux環境でWebサーバーやWordPressを運用していると、メール送信・通知用としてPostfixを稼働させているケースは非常に多いはずです。ある日、何気なくサーバーの状態を確認しようと mailq を叩いた瞬間 […]
27 years of Exchange mailboxes just collapsed into Microsoft's key hierarchy. The enthusiast calls it simplification — really it's concentrating decades of ciphertext under a single CA target. Postfix + Let's Encrypt for alerts swaps one Web PKI dependency for another.
November 8, 2026 at 8:13 PM
27 years of Exchange mailboxes just collapsed into Microsoft's key hierarchy. The enthusiast calls it simplification — really it's concentrating decades of ciphertext under a single CA target. Postfix + Let's Encrypt for alerts swaps one Web PKI dependency for another.
🚨 EUVD-2026-119561
📊 8.7/10
🏢 scriban
📝 Scriban and Scriban.Signed before 7.5.3 contain uncontrolled recursion flaws in which postfix member, indexer, and call chains bypass ExpressionDepthLim...
🔗 https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-119561
#cybersecurity #infosec #cve #euvd
📊 8.7/10
🏢 scriban
📝 Scriban and Scriban.Signed before 7.5.3 contain uncontrolled recursion flaws in which postfix member, indexer, and call chains bypass ExpressionDepthLim...
🔗 https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-119561
#cybersecurity #infosec #cve #euvd
November 8, 2026 at 2:06 PM
🚨 EUVD-2026-119561
📊 8.7/10
🏢 scriban
📝 Scriban and Scriban.Signed before 7.5.3 contain uncontrolled recursion flaws in which postfix member, indexer, and call chains bypass ExpressionDepthLim...
🔗 https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-119561
#cybersecurity #infosec #cve #euvd
📊 8.7/10
🏢 scriban
📝 Scriban and Scriban.Signed before 7.5.3 contain uncontrolled recursion flaws in which postfix member, indexer, and call chains bypass ExpressionDepthLim...
🔗 https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-119561
#cybersecurity #infosec #cve #euvd
Enthusiast abandons self-hosted Microsoft Exchange after 27 years, moving …
https://www.tomshardware.com/software/enthusiast-abandons-self-hosted-microsoft-exchange-after-27-years-moving-mailboxes-to-microsoft-365-replaces-final-on-premises-relay-with-postfix-starttls-and-lets-encrypt-certificates
https://www.tomshardware.com/software/enthusiast-abandons-self-hosted-microsoft-exchange-after-27-years-moving-mailboxes-to-microsoft-365-replaces-final-on-premises-relay-with-postfix-starttls-and-lets-encrypt-certificates
November 9, 2026 at 10:29 PM
Enthusiast abandons self-hosted Microsoft Exchange after 27 years, moving …
https://www.tomshardware.com/software/enthusiast-abandons-self-hosted-microsoft-exchange-after-27-years-moving-mailboxes-to-microsoft-365-replaces-final-on-premises-relay-with-postfix-starttls-and-lets-encrypt-certificates
https://www.tomshardware.com/software/enthusiast-abandons-self-hosted-microsoft-exchange-after-27-years-moving-mailboxes-to-microsoft-365-replaces-final-on-premises-relay-with-postfix-starttls-and-lets-encrypt-certificates
ok... but there's something very satisfying about being in complete control of your spam filtering. i've done this sort of thing before with postfix but that was just using greylisting and pre-defined lists... now i'm implementing reverse dns and dmarc dns tests haha 🤓
woops forgot about having to handle spam in my inboxes looool
November 6, 2026 at 4:22 PM
ok... but there's something very satisfying about being in complete control of your spam filtering. i've done this sort of thing before with postfix but that was just using greylisting and pre-defined lists... now i'm implementing reverse dns and dmarc dns tests haha 🤓
プライバシーやデータ主権の観点から自前で Postfix / Dovecot によるメールサーバーを構築・運用するエンジニアにとって、最大の難関となるのが「スマートフォン端末でのリアルタイム着信」です。Gmail や O […]
Google等の外部中継ゼロで実現する自前メールのリアルタイム着信（IMAP IDLE）構築記
プライバシーやデータ主権の観点から自前で Postfix / Dovecot によるメールサーバーを構築・運用するエンジニアにとって、最大の難関となるのが「スマートフォン端末でのリアルタイム着信」です。Gmail や O […]
tech.nanka-yoshi.com
November 6, 2026 at 2:00 AM
プライバシーやデータ主権の観点から自前で Postfix / Dovecot によるメールサーバーを構築・運用するエンジニアにとって、最大の難関となるのが「スマートフォン端末でのリアルタイム着信」です。Gmail や O […]
Exchange 2019 lost support in October 2025, and on-premises Exchange is now subscription-only. He replaced it with Postfix, the free open-source mail server.
In the comments, he shared his server from 2003, a motherboard zip-tied to the box it came in.
In the comments, he shared his server from 2003, a motherboard zip-tied to the box it came in.
November 6, 2026 at 1:31 AM
Exchange 2019 lost support in October 2025, and on-premises Exchange is now subscription-only. He replaced it with Postfix, the free open-source mail server.
In the comments, he shared his server from 2003, a motherboard zip-tied to the box it came in.
In the comments, he shared his server from 2003, a motherboard zip-tied to the box it came in.
My service provider moved from 365 to something else as there was no end of problems after moving to 365 services.
www.tomshardware.com/software/ent...
www.tomshardware.com/software/ent...
Enthusiast abandons self-hosted Microsoft Exchange after 27 years, moving mailboxes to Microsoft 365 — replaces final on-premises relay with Postfix, STARTTLS and Let's Encrypt certificates
A homelab enthusiast is retiring a Microsoft Exchange installation that began with Exchange 5.5 on Windows NT 4 in 1999. After migrating mailboxes to Microsoft 365, he kept Exchange 2019 running to re...
www.tomshardware.com
November 7, 2026 at 8:52 PM
My service provider moved from 365 to something else as there was no end of problems after moving to 365 services.
www.tomshardware.com/software/ent...
www.tomshardware.com/software/ent...
#582365 cf: 1.0.0-beta.21 -> 1.0.0-beta.27
#582364 python3Packages.compressed-tensors: disable broken tests on Darwin
#582359 audacious-bare: add passthru.updateScript
#582357 postfix-tlspol: 1.14.4 -> 1.14.5
#582356 trufflehog: 3.99.7 -> 3.99.8
#582364 python3Packages.compressed-tensors: disable broken tests on Darwin
#582359 audacious-bare: add passthru.updateScript
#582357 postfix-tlspol: 1.14.4 -> 1.14.5
#582356 trufflehog: 3.99.7 -> 3.99.8
November 3, 2026 at 12:05 AM
#582365 cf: 1.0.0-beta.21 -> 1.0.0-beta.27
#582364 python3Packages.compressed-tensors: disable broken tests on Darwin
#582359 audacious-bare: add passthru.updateScript
#582357 postfix-tlspol: 1.14.4 -> 1.14.5
#582356 trufflehog: 3.99.7 -> 3.99.8
#582364 python3Packages.compressed-tensors: disable broken tests on Darwin
#582359 audacious-bare: add passthru.updateScript
#582357 postfix-tlspol: 1.14.4 -> 1.14.5
#582356 trufflehog: 3.99.7 -> 3.99.8