#postmaster — Public Fediverse posts

Allons bon, v'là aut' chose… Je ne suis plus personne
I have no name !

> Message-ID: <[email protected]>
> To: @gregr.fr
> X-Originating-IP: 35.195.139.164
> Date: Wed, 18 Mar 2026 16:02:29 +0000
> X-Received: by vfj.de id for <@gregr.fr>; Wed, 18 Mar 2026 16:02:29 +0000 (envelope-from <[email protected]>)

#mail #postmaster #sysadmin

Hot Take: E-Mail-Weiterleitungen sind immer Grütze. Egal, ob mit oder ohne SRS, DKIM oder ähnlichem.
Der Mailserver, der die Mails weiterleitet, handelt sich nur Probleme ein.


#mailadmin #postmaster

It works! It finally works! I’ve no idea how I made it work, but it works! I still hate databases. #sysadmin #postmaster #selfhost

Uh oh … unbounded disk usage is back. I hate databases :mastodon_oops: #sysadmin #postmaster #selfhost

But, after all that, the SQLite database from my mail server (which holds all my mail) is now continuously replicating to an offsite backup and the backup restores correctly. Hopefully, this means that if the machine goes down or the database gets corrupted I’ll lose, at most, 15 seconds worth of data (mail) rather than 24-hours as per my previous backup routine.

#sysadmin #postmaster #selfhost

Setting up streaming replication was more of an adventure than I anticipated. Not only did it involve the expected database shenanigans, but it also required
- Battling with not standard chroots and internal-sftp
- Fiddling with the MTU on both ends of my link
- Applying a patch to litestream
- Downloading two different versions of go so that I can compile the binary on two machines running different architecture
- Buying more disk space on my VPS and expanding my LVM partition.
:mastodon_oops: 🫩

#sysadmin #postmaster #selfhost

https://colquitt.xyz/@daniel/115825627066368754

#qotd on [email protected]
> SPF is now basically useless because many SPF records include multi-tenant mail
farms where one tenant can fake make from another.
https://list.mailop.org/private/mailop/2026-January/032134.html
#mail #spf #postmaster

I am THIS close to fully blocking all IP ranges from AS11377 (Sendgrid) on my mailserver as the only thing they are sending my way is Trezor phishing mails. Fellow #postmaster #mailAdmin how do you treat them?

Came across an e-mail server Mox by @mjl written in :golang: Any fediversians using it? :blobcatthinkowo:

Must admit I've been using Exim and Postfix driven e-mail setups for more than two decades, therefore curious to explore a different server, which code I can actually read and understand well :ablobcatbongokeyboard:

Will be setting up a machine to try Mox out :blobcatdonutnom:

#email #serveradmin #sysadmin #postmaster

Ich habe meine bisherigen Erfahrungen zum sehr holprigen Zusammenspiel meines Mailservers (Debian, Postfix, Yunohost) mit dem Microsoft Exchange Server der neuen Schule meines Kindes (und der dort eingesetzten Mailingliste) im Blog ausführlich zusammengefasst:

https://www.caliandro.de/blog/Zusammenspiel_Postfix_DKIM_SPF_DMARC_Mailinglisten.html

Fazit: Man muss die modernen, bisher für mich normalen Sicherheitsstandards leider reduzieren, um die Abwärtskompatibilität mit Microsoft zu gewährleisten.

#yunohost #postmaster #sysadmin #postfix #microsoftExchange #tls #spf #dkim #dmarc #spam #spamhaus #blog

DKIM Fachfrage an Postmaster:innen

Ist das Verhalten korrekt, dass mein Mailserver eine Mail ablehnt, die von mir über eine Mailinglist an n Personen (inkl. mir) gesendet wurde und dann über die Mailingliste mit meiner Mailadresse als fiktiver Absender verteilt wird?

Ich hätte bis gestern gesagt: Ja, sonst ist Phising und Spam zu stark vereinfacht und mein Server rejected diese Mail aus gutem Grund als nicht authentifiziert.

Laut Mailinglistenbetreiber sind meine DKIM Settings fehlerhaft und deshalb würde diese Mail, die vom Mailinglisten-Server unter meiner Identität versendet wird, abgelehnt.

Ich habe ehrlicherweise schon lange keine Mailingliste mehr aktiv benutzt, aber meine mich zu erinnern, dass die an die Mailingliste versendeten Mails immer unter der Identität der Mailingliste selbst verteilt wurden.

Es ist auch so, dass eine Antwort an zu einer Direktmail an den ursprünglichen Absender führt und nicht an die Mailingliste. Damit bekommt der Rest der Personen im Verteiler gar nichts von der Diskussion mit (wenn nicht Antworten an Alle genutzt wurde).

#dkim #mailinglist #postmaster #frage

Wichtiger Hinweis: Ihre Identifizierung ist noch nicht abgeschlossen

https://spam.tamagothi.de/2025/09/08/wichtiger-hinweis-ihre-identifizierung-ist-noch-nicht-abgeschlossen/

Sounds about right

At #Trump’s urging, #USPS board to name #Waste Management official David Steiner as #postmaster general.

Steiner replaces Louis DeJoy, whom Trump forced out of the role in March amid the mail chief’s clashes with billionaire #ElonMusk’s #DOGE.

https://www.washingtonpost.com/business/2025/05/06/usps-trump-david-steiner/

Louis #DeJoy #Resigns as #Postmaster General 🤔

His sudden departure comes after he struck an agreement earlier this month to allow Elon Musk’s Department of Government Efficiency inside the USPS to cut costs and remove bureaucratic red tape.

https://time.com/7271271/louis-dejoy-resigns-postmaster-general/

#MailInVoting #BlackMastodon

Added *.sa.com and *.za.com to the blocklist of my mailserver. AFAICS they only send spam around and have become quite active in the past few days. #postmaster life :) (UPDATE: more precise regex)

#Biden just got one step closer to replacing #Postmaster General Louis #DeJoy

#VoteAllBlue2024 #BlackMastodon

https://www.alternet.org/biden-replace-dejoy/

#Biden just got one step closer to replacing #Postmaster General Louis #DeJoy

#VoteAllBlue2024 #BlackMastodon

https://www.alternet.org/biden-replace-dejoy/

#Biden just got one step closer to replacing #Postmaster General Louis #DeJoy

#VoteAllBlue2024 #BlackMastodon

https://www.alternet.org/biden-replace-dejoy/

#Biden just got one step closer to replacing #Postmaster General Louis #DeJoy

#VoteAllBlue2024 #BlackMastodon

https://www.alternet.org/biden-replace-dejoy/

#Biden just got one step closer to replacing #Postmaster General Louis #DeJoy

#VoteAllBlue2024 #BlackMastodon

https://www.alternet.org/biden-replace-dejoy/

Alleged Luxor Data Breach: Sensitive Information from Indian Stationery Giant Leaked https://thecyberexpress.com/alleged-luxor-data-breach/ #TheCyberExpressNews #Luxordatabreach #TheCyberExpress #FirewallDaily #Luxordataleak #HackerClaims #DarkWebNews #postmaster #darkweb

Alleged Luxor Data Breach: Sensitive Information from Indian Stationery Giant Leaked https://thecyberexpress.com/alleged-luxor-data-breach/ #TheCyberExpressNews #Luxordatabreach #TheCyberExpress #FirewallDaily #Luxordataleak #HackerClaims #DarkWebNews #postmaster #darkweb

Alleged Luxor Data Breach: Sensitive Information from Indian Stationery Giant Leaked https://thecyberexpress.com/alleged-luxor-data-breach/ #TheCyberExpressNews #Luxordatabreach #TheCyberExpress #FirewallDaily #Luxordataleak #HackerClaims #DarkWebNews #postmaster #darkweb

Alleged Luxor Data Breach: Sensitive Information from Indian Stationery Giant Leaked https://thecyberexpress.com/alleged-luxor-data-breach/ #TheCyberExpressNews #Luxordatabreach #TheCyberExpress #FirewallDaily #Luxordataleak #HackerClaims #DarkWebNews #postmaster #darkweb

Mad props to the #telekom #postmaster, got my mail server IP unblocked with less than 20 mins response time 👍
(Didn't had to block me in the first place, but hey, you take what you can get 😅 )

@GatekeepKen

Time Magazine, which tends to lean left, opened my eyes about this guy. I say keep him and let him finish the job. What say you?

https://time.com/6263424/louis-dejoy-trump-election-postal-reform/

#usps #dejoy #postmaster

@stilgherrian .10% x 5000 is 5 spam reports. A competitor could easily put you in the danger zone by reporting you from five gmail accounts. So just that right there is incentive enough to opt-in to #Google's services.

I haven't looked deep into the #Postmaster tool, but just using history as a guide, I'm certain it collects data.

#AOL tried to pull something similar and people rightfully revolted. It was an anti-competitive weaponization of security.

Seeking #maiinglist owner documentation for #mailman3 .

Actually I try to figure out what the option "pre_verified" in mass-subscribe does. Anyhow, I can not find any documentation: The Postorius documentation https://docs.mailman3.org/projects/postorius/en/latest/development.html addresses sysadmins only. The Mailman Core docs https://docs.mailman3.org/projects/mailman/en/latest/ are oriented towards developers and even deep inside I can't find a single word about this.

Any hints?

#mailman #sysadmin #postmaster #followerpower

A hilarious #job "offer" by #CanadaPost. They are looking for a #postmaster in remote #Atlin, #BC. The pay is only about $660 a week - but the employee must pay for #rent, #heat, repair, insurance, everything of the post office (a facility they must establish first). Plus, a month before employment begins, they must already provide the facility. Atlin is at the #Northern edge of BC, so heating costs are serious. Whoever takes that "job" is a #philanthropist or an #ID10T.
https://jobs.canadapost.ca/job/Atlin-Postmaster-Premises-provided-by-Postmaster-%28Group-Office%29-BC/566159217/

E-Mails, die E-Mails schmuggeln und so Phishing-Mails ermöglichen!? Kein Spaß für Postmaster kurz vor den Weihnachtsferien. - Wir zeigen, worum es eigentlich geht und was Admins und Postmaster jetzt tun können.

#SMTP #smuggling #Postfix #Mailserver #Postmaster #MTA #Spoofing #SMTPSmuggling #SECconsult

https://www.heinlein-support.de/blog/smtp-smuggling-aka-postmasters-weihnachtsstress

E-Mails, die E-Mails schmuggeln und so Phishing-Mails ermöglichen!? Kein Spaß für Postmaster kurz vor den Weihnachtsferien. - Wir zeigen, worum es eigentlich geht und was Admins und Postmaster jetzt tun können.

#SMTP #smuggling #Postfix #Mailserver #Postmaster #MTA #Spoofing #SMTPSmuggling #SECconsult

https://www.heinlein-support.de/blog/smtp-smuggling-aka-postmasters-weihnachtsstress

E-Mails, die E-Mails schmuggeln und so Phishing-Mails ermöglichen!? Kein Spaß für Postmaster kurz vor den Weihnachtsferien. - Wir zeigen, worum es eigentlich geht und was Admins und Postmaster jetzt tun können.

#SMTP #smuggling #Postfix #Mailserver #Postmaster #MTA #Spoofing #SMTPSmuggling #SECconsult

https://www.heinlein-support.de/blog/smtp-smuggling-aka-postmasters-weihnachtsstress

E-Mails, die E-Mails schmuggeln und so Phishing-Mails ermöglichen!? Kein Spaß für Postmaster kurz vor den Weihnachtsferien. - Wir zeigen, worum es eigentlich geht und was Admins und Postmaster jetzt tun können.

#SMTP #smuggling #Postfix #Mailserver #Postmaster #MTA #Spoofing #SMTPSmuggling #SECconsult

https://www.heinlein-support.de/blog/smtp-smuggling-aka-postmasters-weihnachtsstress

E-Mails, die E-Mails schmuggeln und so Phishing-Mails ermöglichen!? Kein Spaß für Postmaster kurz vor den Weihnachtsferien. - Wir zeigen, worum es eigentlich geht und was Admins und Postmaster jetzt tun können.

#SMTP #smuggling #Postfix #Mailserver #Postmaster #MTA #Spoofing #SMTPSmuggling #SECconsult

https://www.heinlein-support.de/blog/smtp-smuggling-aka-postmasters-weihnachtsstress

Seeking #maiinglist owner documentation for #mailman3 .

Actually I try to figure out what the option "pre_verified" in mass-subscribe does. Anyhow, I can not find any documentation: The Postorius documentation https://docs.mailman3.org/projects/postorius/en/latest/development.html addresses sysadmins only. The Mailman Core docs https://docs.mailman3.org/projects/mailman/en/latest/ are oriented towards developers and even deep inside I can't find a single word about this.

Any hints?

#mailman #sysadmin #postmaster #followerpower

Seeking #maiinglist owner documentation for #mailman3 .

Actually I try to figure out what the option "pre_verified" in mass-subscribe does. Anyhow, I can not find any documentation: The Postorius documentation https://docs.mailman3.org/projects/postorius/en/latest/development.html addresses sysadmins only. The Mailman Core docs https://docs.mailman3.org/projects/mailman/en/latest/ are oriented towards developers and even deep inside I can't find a single word about this.

Any hints?

#mailman #sysadmin #postmaster #followerpower

Seeking #maiinglist owner documentation for #mailman3 .

Actually I try to figure out what the option "pre_verified" in mass-subscribe does. Anyhow, I can not find any documentation: The Postorius documentation https://docs.mailman3.org/projects/postorius/en/latest/development.html addresses sysadmins only. The Mailman Core docs https://docs.mailman3.org/projects/mailman/en/latest/ are oriented towards developers and even deep inside I can't find a single word about this.

Any hints?

#mailman #sysadmin #postmaster #followerpower