From b1ea3c04254b590b909b49cdecf35bb1b59824e0 Mon Sep 17 00:00:00 2001
From: Pjotr Prins
Date: Sat, 27 May 2023 11:24:41 -0500
Subject: Started on opensmtpd container

---
 topics/systems/mailer-opensmtpd.gmi | 56 +++++++++++++++++++++++++++++++++++++
 1 file changed, 56 insertions(+)
 create mode 100644 topics/systems/mailer-opensmtpd.gmi

(limited to 'topics/systems')

diff --git a/topics/systems/mailer-opensmtpd.gmi b/topics/systems/mailer-opensmtpd.gmi
new file mode 100644
index 0000000..6463c91
--- /dev/null
+++ b/topics/systems/mailer-opensmtpd.gmi
@@ -0,0 +1,56 @@
+# OpenSMTPD
+
+We have been using postfix and exim on different servers. Now it may be the time to switch to opensmtpd as it is modern, secure and easier to configure. Guix comes with a default opensmtp service, so let's try and get that running as a system container for reasons of deployment. See also
+
+=> ../deployment.gmi
+
+Setting up a mail service with Guix is described in
+
+=> https://guix.gnu.org/en/manual/devel/en/html_node/Mail-Services.html
+
+A service is defined as
+
+```scheme
+(service opensmtpd-service-type
+         (opensmtpd-configuration
+           (config-file (local-file "./my-smtpd.conf"))))
+```
+
+A first attempt at running a container is
+
+```
+(use-modules (gnu)
+             (gnu services mail))
+
+(operating-system
+  (host-name "mail")
+  (timezone "UTC")
+  (locale "en_US.utf8")
+  (bootloader (bootloader-configuration
+               (bootloader grub-bootloader)
+               (targets (list "/dev/sdX"))))
+  (file-systems %base-file-systems)
+  (users %base-user-accounts)
+  (packages %base-packages)
+
+  (services (cons
+             (service opensmtpd-service-type
+                      (opensmtpd-configuration
+                       (config-file %default-opensmtpd-config-file
+                       ; (config-file (local-file "./my-smtpd.conf")))
+                                    )))
+             %base-services)))
+```
+
+Running
+
+```
+guix system container opensmtpd.scm
+/gnu/store/n6ap881jp3lgms35z0dyw4mnkkqsnm89-run-container
+```
+
+creates a container file that can be started with the returned launcher, e.g. as root
+
+```
+/gnu/store/n6ap881jp3lgms35z0dyw4mnkkqsnm89-run-container
+```
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