Send transactional email through Postmark in production

Gemfile

@@ -42,6 +42,9 @@ gem "thruster", require: false
 # Use Active Storage variants [https://guides.rubyonrails.org/active_storage_overview.html#transforming-images]
 gem "image_processing", "~> 1.2"
 
+# Send transactional email through Postmark in production [https://github.com/ActiveCampaign/postmark-rails]
+gem "postmark-rails", "~> 0.22"
+
 group :development, :test do
   # See https://guides.rubyonrails.org/debugging_rails_applications.html#debugging-with-the-debug-gem
   gem "debug", platforms: %i[ mri windows ], require: "debug/prelude"

Gemfile.lock

@@ -248,6 +248,11 @@ GEM
     parser (3.3.11.1)
       ast (~> 2.4.1)
       racc
+    postmark (1.25.1)
+      json
+    postmark-rails (0.22.1)
+      actionmailer (>= 3.0.0)
+      postmark (>= 1.21.3, < 2.0)
     pp (0.6.3)
       prettyprint
     prettyprint (0.2.0)
@@ -424,6 +429,7 @@ DEPENDENCIES
   jbuilder
   kamal
   letter_opener
+  postmark-rails (~> 0.22)
   propshaft
   puma (>= 5.0)
   rails!
@@ -526,6 +532,8 @@ CHECKSUMS
   ostruct (0.6.3) sha256=95a2ed4a4bd1d190784e666b47b2d3f078e4a9efda2fccf18f84ddc6538ed912
   parallel (2.1.0) sha256=b35258865c2e31134c5ecb708beaaf6772adf9d5efae28e93e99260877b09356
   parser (3.3.11.1) sha256=d17ace7aabe3e72c3cc94043714be27cc6f852f104d81aa284c2281aecc65d54
+  postmark (1.25.1) sha256=2ac110fa1b4f85a62996fdc63167922eea1c4284a9a7ceb9e007f2758d9e17be
+  postmark-rails (0.22.1) sha256=fcea27dda4f7418123d7723622ec5447df4dacacc10a20a40add0f6789135d8f
   pp (0.6.3) sha256=2951d514450b93ccfeb1df7d021cae0da16e0a7f95ee1e2273719669d0ab9df6
   prettyprint (0.2.0) sha256=2bc9e15581a94742064a3cc8b0fb9d45aae3d03a1baa6ef80922627a0766f193
   prism (1.9.0) sha256=7b530c6a9f92c24300014919c9dcbc055bf4cdf51ec30aed099b06cd6674ef85

app/mailers/application_mailer.rb

@@ -1,4 +1,4 @@
 class ApplicationMailer < ActionMailer::Base
-  default from: "from@example.com"
+  default from: "no-reply@community-foundations.rowhomelabs.com"
   layout "mailer"
 end

config/credentials/production.yml.enc

@@ -1 +1 @@
-97luwAcQGslJIAFEcWNvbdiLnvhLy9ny+kayvBRiXK83C3BtpBFggxRuc2V4uZWeU00+PRBLPN6aQWSk/1wEtRvyl7I5eFRkS7ThCfKc51dJilEm7R2e4ENHV3pN+jQB9oxRIeKE2TYBtIZaMKpmt7bWbvpkN+9qKl0BjnIa0AbkX8/LmAzK5crUsm75HbSaW7f7244WpQ/vjWcuICH8BE+6E4MX0ketNeS9hi3YMD/Ry6vs+oSMTTb4uPT50QugZMfbSz/pLVJHKcnIUtpxmV4ocUOFCSuJOV5ehAuzDRv4au/xwvP+84/pVzenW/a61BShaS0/KziqbFD6BN99du4E4lUkb0yhHxainSIVqB1iBlV38h3iWSerytxSYTJRk7nH1dx9MxGwftdMdbNGMVygHO4HL4ppdEz6sp4=--UBnYSBFV6lXze2Ay--sDdwbw7FX5+HMnpVK/18Aw==
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--fM0xWbCXnCrb5Vho--B1KSjMxlfFxAa51y2cjxfQ==

config/environments/production.rb

@@ -66,14 +66,14 @@
   # Set host to be used by links generated in mailer templates.
   config.action_mailer.default_url_options = { host: "community-foundations.rowhomelabs.com" }
 
-  # Specify outgoing SMTP server. Remember to add smtp/* credentials via bin/rails credentials:edit.
-  # config.action_mailer.smtp_settings = {
-  #   user_name: Rails.application.credentials.dig(:smtp, :user_name),
-  #   password: Rails.application.credentials.dig(:smtp, :password),
-  #   address: "smtp.example.com",
-  #   port: 587,
-  #   authentication: :plain
-  # }
+  # Deliver mail through Postmark. Add the API token via
+  # bin/rails credentials:edit --environment=production  (key: postmark.api_token)
+  config.action_mailer.delivery_method = :postmark
+  config.action_mailer.postmark_settings = {
+    api_token: Rails.application.credentials.dig(:postmark, :api_token)
+  }
+  # Surface delivery failures inside the Solid Queue job so they're visible and retryable.
+  config.action_mailer.raise_delivery_errors = true
 
   # Enable locale fallbacks for I18n (makes lookups for any locale fall back to
   # the I18n.default_locale when a translation cannot be found).
@@ -89,7 +89,7 @@
   # page) plus any org subdomain like "arlington.community-foundations.rowhomelabs.com".
   config.hosts = [
     "community-foundations.rowhomelabs.com",
     /\A[a-z0-9-]+\.community-foundations\.rowhomelabs\.com\z/, # org subdomains
   ]
 
   # Skip DNS rebinding protection for the default health check endpoint (kamal-proxy hits