#postfix

Stumpi im Retroland<a href="https://cultur.social/@marcuwekling" class="u-url mention" rel="nofollow noopener" target="_blank">@marcuwekling</a> Großartige Idee! Ich bin (eh schon) dabei! 🙃 <a href="https://c64.social/tags/dutgemacht" class="mention hashtag" rel="nofollow noopener" target="_blank">#dutgemacht</a> <a href="https://c64.social/tags/ididit" class="mention hashtag" rel="nofollow noopener" target="_blank">#ididit</a> Hier was ich derzeit schon so nutze:- Eigener Mailserver <a href="https://c64.social/tags/postfix" class="mention hashtag" rel="nofollow noopener" target="_blank">#postfix</a> <a href="https://c64.social/tags/clamav" class="mention hashtag" rel="nofollow noopener" target="_blank">#clamav</a> <a href="https://c64.social/tags/rspamd" class="mention hashtag" rel="nofollow noopener" target="_blank">#rspamd</a> <a href="https://c64.social/tags/roundcubemail" class="mention hashtag" rel="nofollow noopener" target="_blank">#roundcubemail</a> <a href="https://c64.social/tags/dovecot" class="mention hashtag" rel="nofollow noopener" target="_blank">#dovecot</a> - Notebooks auf <a href="https://c64.social/tags/Linux" class="mention hashtag" rel="nofollow noopener" target="_blank">#Linux</a> - <a href="https://c64.social/tags/pfsense" class="mention hashtag" rel="nofollow noopener" target="_blank">#pfsense</a> Firewall - <a href="https://c64.social/tags/thunderbird" class="mention hashtag" rel="nofollow noopener" target="_blank">#thunderbird</a> Selber gehostete freie Dienste/Software derzeit: - <a href="https://c64.social/tags/Nextcloud" class="mention hashtag" rel="nofollow noopener" target="_blank">#Nextcloud</a> - <a href="https://c64.social/tags/PaperlessNGX" class="mention hashtag" rel="nofollow noopener" target="_blank">#PaperlessNGX</a> - <a href="https://c64.social/tags/Peertube" class="mention hashtag" rel="nofollow noopener" target="_blank">#Peertube</a> - <a href="https://c64.social/tags/HomeAssistant" class="mention hashtag" rel="nofollow noopener" target="_blank">#HomeAssistant</a> - <a href="https://c64.social/tags/Mastodon" class="mention hashtag" rel="nofollow noopener" target="_blank">#Mastodon</a> - <a href="https://c64.social/tags/Matrix" class="mention hashtag" rel="nofollow noopener" target="_blank">#Matrix</a> - <a href="https://c64.social/tags/Wordpress" class="mention hashtag" rel="nofollow noopener" target="_blank">#Wordpress</a> Fremdgehostete freie Dienste: - <a href="https://c64.social/tags/pixelfed" class="mention hashtag" rel="nofollow noopener" target="_blank">#pixelfed</a> - <a href="https://c64.social/tags/bigbluebutton" class="mention hashtag" rel="nofollow noopener" target="_blank">#bigbluebutton</a> - <a href="https://c64.social/tags/letsencrypt" class="mention hashtag" rel="nofollow noopener" target="_blank">#letsencrypt</a> Leider kann ich meinen Windowsrechner noch nicht loswerden <a href="https://c64.social/tags/gamer" class="mention hashtag" rel="nofollow noopener" target="_blank">#gamer</a> - aber das kommt bestimmt auch noch irgendwann... 🤞

rixxbecause running a mail server wasn’t fun enough: the Dovecot 2.3 → 2.4 update has tons of breaking config changes(h/t to <a href="https://willem.com/blog/2025-06-04_breaking-changes/" rel="nofollow noopener" translate="no" target="_blank">https://willem.com/blog/2025-06-04_breaking-changes/</a> for the exhaustive breakdown of the changes)<a href="https://chaos.social/tags/mailadmin" class="mention hashtag" rel="nofollow noopener" target="_blank">#mailadmin</a> <a href="https://chaos.social/tags/dovecot" class="mention hashtag" rel="nofollow noopener" target="_blank">#dovecot</a> <a href="https://chaos.social/tags/postfix" class="mention hashtag" rel="nofollow noopener" target="_blank">#postfix</a> <a href="https://chaos.social/tags/sysadmin" class="mention hashtag" rel="nofollow noopener" target="_blank">#sysadmin</a>

RinceFrage an die Schwarmintelligenz: Kann ich <a href="https://chaos.social/tags/postfix" class="mention hashtag" rel="nofollow noopener" target="_blank">#postfix</a> sagen, das es _als Server_ einige Mailhosts von der Vorgabe ausnehmen soll, TLS zu sprechen? Ich scheine Mailserver zu haben die zwar behaupten TLS zu können, aber dann die Verbindung abbricht. Diesen würde ich gerne kein TLS anbieten... was ist dafür das flag?

Brook MilesI have succeeded in configuring both Cyrus IMAP and Postfix to authenticate using an LLDAP server. Please clap.<a href="https://sunny.garden/tags/CyrusIMAP" class="mention hashtag" rel="nofollow noopener" target="_blank">#CyrusIMAP</a> <a href="https://sunny.garden/tags/Postfix" class="mention hashtag" rel="nofollow noopener" target="_blank">#Postfix</a>

SWEETGOODNie mehr Ärger mit Blacklistings bei Microsoft – dank Transport Maps in Postfix/mailcow und einem kostenfreien Relayhost 😎<a href="https://andersgood.de/kurz-notiert/schluss-mit-blacklisting-bei-microsoft" rel="nofollow noopener" translate="no" target="_blank">https://andersgood.de/kurz-notiert/schluss-mit-blacklisting-bei-microsoft</a><a href="https://social.tchncs.de/tags/SWEETGOOD" class="mention hashtag" rel="nofollow noopener" target="_blank">#SWEETGOOD</a> <a href="https://social.tchncs.de/tags/andersGOOD" class="mention hashtag" rel="nofollow noopener" target="_blank">#andersGOOD</a> <a href="https://social.tchncs.de/tags/mailcow" class="mention hashtag" rel="nofollow noopener" target="_blank">#mailcow</a> <a href="https://social.tchncs.de/tags/Postfix" class="mention hashtag" rel="nofollow noopener" target="_blank">#Postfix</a> <a href="https://social.tchncs.de/tags/relayhost" class="mention hashtag" rel="nofollow noopener" target="_blank">#relayhost</a> <a href="https://social.tchncs.de/tags/email" class="mention hashtag" rel="nofollow noopener" target="_blank">#email</a> <a href="https://social.tchncs.de/tags/mail" class="mention hashtag" rel="nofollow noopener" target="_blank">#mail</a> <a href="https://social.tchncs.de/tags/microsoft" class="mention hashtag" rel="nofollow noopener" target="_blank">#microsoft</a> <a href="https://social.tchncs.de/tags/capitalism" class="mention hashtag" rel="nofollow noopener" target="_blank">#capitalism</a>

René's old blogSending newsletters in bulkFull post here. <a href="https://rene.seindal.dk/2025/06/17/sending-newsletters-in-bulk/" class="" rel="nofollow noopener" target="_blank">https://rene.seindal.dk/2025/06/17/sending-newsletters-in-bulk/</a>I have a newsletter — <a href="https://venetianstories.com/newsletter/" rel="nofollow noopener" target="_blank">Venetian Stories</a> about the history of Venice — with a couple of hundred recipients.For some time, I have managed that with a free WordPress plugin. One of those with a PRO version, and every update shifted some functionality over to the paid version.When I wanted to move the newsletter from my <a href="https://historywalksvenice.com/" rel="nofollow noopener" target="_blank">History Walks Venice</a> site to a dedicated domain, there was no way of migrating the plugin data without moving to the PRO version. Several functions I had used for a long time, were no only available for payment.Confronted with these futile complications, I decided to return to basics.The newsletters would be sent from my mail application of choice, as HTML emails, with all the recipients in the BCC field.<a rel="nofollow noopener" class="hashtag u-tag u-category" href="https://rene.seindal.dk/tag/bulk-mail/" target="_blank">#BulkMail</a> <a rel="nofollow noopener" class="hashtag u-tag u-category" href="https://rene.seindal.dk/tag/mail-in-a-box/" target="_blank">#MailInABox</a> <a rel="nofollow noopener" class="hashtag u-tag u-category" href="https://rene.seindal.dk/tag/postfix/" target="_blank">#Postfix</a> <a rel="nofollow noopener" class="hashtag u-tag u-category" href="https://rene.seindal.dk/tag/venetian-stories/" target="_blank">#VenetianStories</a>

Jan Wildeboer 😷:krulorange:<a href="https://social.wildeboer.net/tags/NerdSpeak" class="mention hashtag" rel="nofollow noopener" target="_blank">#NerdSpeak</a> Some mail senders are exposing internal, non-resolving host names in the EHLO/HELO phase when sending mails, causing my mail server to (correctly) refuse them. However, in some cases I have to begrudgingly accept their broken config as the mails they send are actually legitimate and important. Looking at you, Drillisch Online. Fix your shit. Anyway, here's how I did it on my <a href="https://social.wildeboer.net/tags/postfix" class="mention hashtag" rel="nofollow noopener" target="_blank">#postfix</a> server: <a href="https://codeberg.org/jwildeboer/gists/src/branch/main/2025/20250615HELOAllowlistPostfix.md" rel="nofollow noopener" translate="no" target="_blank">https://codeberg.org/jwildeboer/gists/src/branch/main/2025/20250615HELOAllowlistPostfix.md</a>1/3

Brook MilesAgainst all odds I have configured a test Cyrus IMAP + Postfix server that both sends and receives email. :goose_hacker: It's jank as heck, and absolutely not a useful production setup, but it does "work", and only took 3 hours.<a href="https://sunny.garden/tags/CyrusIMAP" class="mention hashtag" rel="nofollow noopener" target="_blank">#CyrusIMAP</a> <a href="https://sunny.garden/tags/Postfix" class="mention hashtag" rel="nofollow noopener" target="_blank">#Postfix</a>

David Chisnall (*Now with 50% more sarcasm!*)Any <a href="https://infosec.exchange/tags/postfix" class="mention hashtag" rel="nofollow noopener" target="_blank">#postfix</a> users know how to configure <code>smtp_tls_wrappermode = yes</code> for sending via a single relay, but not use it for others? I have things set up to relay via my outbound SMTP server to a few mail servers that all want STARTTLS over port 587, but now I want to add one that wants SMTPS over port 465. If I don't set <code>smtp_tls_wrappermode = yes</code>, it refuses to connect to the new server. If I do set it, it refuses to connect to the existing ones. There are some hints in the documentation that you can use <code>transport_maps</code> in some way, but I can't figure out how.

Rob Carlson :ally: :BLM:Finally gave in and wrote some Postfix rules to route SMTP traffic for *.outlook.com hosted domains (basically any school or government I email) through IPv4 instead of IPv6 to stop being blocked by Spamhaus false positives on "my" shared v6/64. <a href="https://epistolary.org/tags/IPv6" class="mention hashtag" rel="nofollow noopener" target="_blank">#IPv6</a> <a href="https://epistolary.org/tags/SpamHaus" class="mention hashtag" rel="nofollow noopener" target="_blank">#SpamHaus</a> <a href="https://epistolary.org/tags/Postfix" class="mention hashtag" rel="nofollow noopener" target="_blank">#Postfix</a>

Bruce HeerssenQuestion for postfix folks:I have a Postfix instance handling two virtual domains on a VPS, and both currently share the same ipv4 and ipv6 addresses. I would like to properly configure dmarc, but that requires separate IP addresses for each domain. My provider is loathe to give me a second ipv4 address, claiming scarcity. Fair enough. They did provide an ipv6 range that I can use.So, are there still issues with ditching ipv4 altogether for at least one of the domains?<a href="https://darkmoon.social/tags/Postfix" class="mention hashtag" rel="nofollow noopener" target="_blank">#Postfix</a> <a href="https://darkmoon.social/tags/ServerAdmin" class="mention hashtag" rel="nofollow noopener" target="_blank">#ServerAdmin</a>

Bruce HeerssenWell, this blows. Spamhaus has blocked the entire 2600:3c00::/64 IPv6 range, which includes my email server. That seems a little excessive.I found out because I tried to send an email to my employer, and they use Spamhaus. This is a problem for me and I'm not sure what to do. Maybe I can disable IPv6 for sending email. I dunno.<a href="https://check.spamhaus.org/results/?query=2600:3c00::f03c:94ff:fe85:b6ee" rel="nofollow noopener" translate="no" target="_blank">https://check.spamhaus.org/results/?query=2600:3c00::f03c:94ff:fe85:b6ee</a><a href="https://darkmoon.social/tags/ServerAdmin" class="mention hashtag" rel="nofollow noopener" target="_blank">#ServerAdmin</a> <a href="https://darkmoon.social/tags/Postfix" class="mention hashtag" rel="nofollow noopener" target="_blank">#Postfix</a> <a href="https://darkmoon.social/tags/Spam" class="mention hashtag" rel="nofollow noopener" target="_blank">#Spam</a>

Mikael HanssonThis weekend's project: Replaced my <a href="https://hachyderm.io/tags/Postfix" class="mention hashtag" rel="nofollow noopener" target="_blank">#Postfix</a> <a href="https://hachyderm.io/tags/MTA" class="mention hashtag" rel="nofollow noopener" target="_blank">#MTA</a> <a href="https://hachyderm.io/tags/mailserver" class="mention hashtag" rel="nofollow noopener" target="_blank">#mailserver</a> with a new one. I had been running a <a href="https://hachyderm.io/tags/Ubuntu" class="mention hashtag" rel="nofollow noopener" target="_blank">#Ubuntu</a> based one since 2020, and it didn't deal well with an in-place upgrade.New machine set up on <a href="https://hachyderm.io/tags/Debian" class="mention hashtag" rel="nofollow noopener" target="_blank">#Debian</a> 12, with a bunch of tips stolen from <a href="https://io.mwl.io/@mwl" class="u-url mention" rel="nofollow noopener" target="_blank">@mwl</a> 's book Run Your Own Mail Server and from <a href="https://workaround.org/ispmail-bookworm/" rel="nofollow noopener" translate="no" target="_blank">https://workaround.org/ispmail-bookworm/</a>

Schenkl | 🏳️‍🌈🦄Ein Worst-Case tritt gerade ein: Ich muss mich mit <a href="https://chaos.social/tags/Postfix" class="mention hashtag" rel="nofollow noopener" target="_blank">#Postfix</a> außeinandersetzen 🙄

SantiagoSysadmins del fediverso, que score usan para Spamassassin? <a href="https://mastodon.uy/tags/spam" class="mention hashtag" rel="nofollow noopener" target="_blank">#spam</a> <a href="https://mastodon.uy/tags/spamassassin" class="mention hashtag" rel="nofollow noopener" target="_blank">#spamassassin</a> <a href="https://mastodon.uy/tags/sysadmin" class="mention hashtag" rel="nofollow noopener" target="_blank">#sysadmin</a> <a href="https://mastodon.uy/tags/correo" class="mention hashtag" rel="nofollow noopener" target="_blank">#correo</a> <a href="https://mastodon.uy/tags/email" class="mention hashtag" rel="nofollow noopener" target="_blank">#email</a> <a href="https://mastodon.uy/tags/postfix" class="mention hashtag" rel="nofollow noopener" target="_blank">#postfix</a> <a href="https://mastodon.uy/tags/dovecot" class="mention hashtag" rel="nofollow noopener" target="_blank">#dovecot</a>

gary<a href="https://mastodon.social/@gerowen" class="u-url mention" rel="nofollow noopener" target="_blank">@gerowen</a> running your own mailserver ncan be a minor timesink but also probably well worth it - email is the original killer app. there are quite a few ways you can do it. I set up logwatch to send out mail to gmail and it is always spotty <a href="https://infosec.exchange/tags/rroundcube" class="mention hashtag" rel="nofollow noopener" target="_blank">#rroundcube</a> <a href="https://infosec.exchange/tags/postfix" class="mention hashtag" rel="nofollow noopener" target="_blank">#postfix</a> <a href="https://infosec.exchange/tags/own" class="mention hashtag" rel="nofollow noopener" target="_blank">#own</a> mailbox this may run better on a vm or a vps/vpn combo - you are more advanced, i see this as a good project for you and me both really but email is a deep pocket of knowledge - lots of knobs and optionsalso caveat this is like c 2015 but i like the concept<a href="https://www.cnx-software.com/2015/09/18/own-mailbox-is-a-tiny-secure-and-open-source-hardware-mail-server-crowdfunding/" rel="nofollow noopener" translate="no" target="_blank">https://www.cnx-software.com/2015/09/18/own-mailbox-is-a-tiny-secure-and-open-source-hardware-mail-server-crowdfunding/</a>

DeltaLima 🐧Hey <a href="https://social.la10cy.net/tags/Sysadmin" class="mention hashtag" rel="nofollow noopener" target="_blank">#Sysadmin</a>|s of the fediverse, I want to ask you for some recommendation, I want to get rid of my old and molden mailsystem.I just need Mail for a couple accounts and domains for myself and some friends. Would be nice to have a WebGUI, but is not a must.<a href="https://social.la10cy.net/tags/selfhosting" class="mention hashtag" rel="nofollow noopener" target="_blank">#selfhosting</a> <a href="https://social.la10cy.net/tags/mail" class="mention hashtag" rel="nofollow noopener" target="_blank">#mail</a> <a href="https://social.la10cy.net/tags/mailsystem" class="mention hashtag" rel="nofollow noopener" target="_blank">#mailsystem</a> <a href="https://social.la10cy.net/tags/email" class="mention hashtag" rel="nofollow noopener" target="_blank">#email</a> <a href="https://social.la10cy.net/tags/postfix" class="mention hashtag" rel="nofollow noopener" target="_blank">#postfix</a> <a href="https://social.la10cy.net/tags/smtp" class="mention hashtag" rel="nofollow noopener" target="_blank">#smtp</a> <a href="https://social.la10cy.net/tags/courier" class="mention hashtag" rel="nofollow noopener" target="_blank">#courier</a>

Stéphane Bortzmeyer<a href="https://mastodon.gougere.fr/tags/sysAdmin" class="mention hashtag" rel="nofollow noopener" target="_blank">#sysAdmin</a> <a href="https://mastodon.gougere.fr/tags/Postfix" class="mention hashtag" rel="nofollow noopener" target="_blank">#Postfix</a> Ah, je viens d'avoir le "unexpected attribute smtputf8 from xxx socket (expecting: sendopts)" Voilà ce qui arrive quand on ne lit pas les release notes. (Executive summary : redémarrez Postfix.)

Stuart Longland (VK4MSL)Well, after a lot of swearing… I *think* I have a Raspberry Pi 400 running <a href="https://aus.social/tags/AlpineLinux" class="mention hashtag" rel="nofollow noopener" target="_blank">#AlpineLinux</a> … tethered to my 4G phone hotspot … acting as a crude WiFi router/bridge for my border router running <a href="https://aus.social/tags/OpenBSD" class="mention hashtag" rel="nofollow noopener" target="_blank">#OpenBSD</a> which is tunnelling to my OpenBSD VPS at Binary Lane.Over that tunnel, I now have <a href="https://aus.social/tags/Postfix" class="mention hashtag" rel="nofollow noopener" target="_blank">#Postfix</a> on the home mail server, relaying over the VPN to <a href="https://aus.social/tags/OpenSMTPD" class="mention hashtag" rel="nofollow noopener" target="_blank">#OpenSMTPD</a> on the VPS.Should be useful the day I have to leave Internode… but for now, it's bypassing the rather dead NBN service (thank-you <a href="https://aus.social/tags/CycloneAlfred" class="mention hashtag" rel="nofollow noopener" target="_blank">#CycloneAlfred</a>).

Delta Chat<a href="https://mastodon.social/@mavu" class="u-url mention" rel="nofollow noopener" target="_blank">@mavu</a> We use <a href="https://chaos.social/tags/postfix" class="mention hashtag" rel="nofollow noopener" target="_blank">#postfix</a> in <a href="https://chaos.social/tags/chatmail" class="mention hashtag" rel="nofollow noopener" target="_blank">#chatmail</a> setup, and so does <a href="https://mailcow.social/@doncow" class="u-url mention" rel="nofollow noopener" target="_blank">@doncow</a> It is well-documented and in our setup at <a href="https://github.com/chatmail/server" rel="nofollow noopener" translate="no" target="_blank">https://github.com/chatmail/server</a> there are only two small postfix configs.

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