Update email provider settings in TF to use Mailgun (#2978)

New TF variables have been added to both Staging and Production
workspaces under the key `mailgun_server_api_token`

elixir/apps/domain/priv/repo/seeds.exs

@@ -2,7 +2,7 @@ alias Domain.{Repo, Accounts, Auth, Actors, Relays, Gateways, Resources, Policie
 
 # Seeds can be run both with MIX_ENV=prod and MIX_ENV=test, for test env we don't have
 # an adapter configured and creation of email provider will fail, so we will override it here.
-System.put_env("OUTBOUND_EMAIL_ADAPTER", "Elixir.Swoosh.Adapters.Postmark")
+System.put_env("OUTBOUND_EMAIL_ADAPTER", "Elixir.Swoosh.Adapters.Mailgun")
 
 # This function is used to update fields if STATIC_SEEDS is set,
 # which helps with static docker-compose environment for local development.

terraform/environments/production/main.tf

@@ -510,15 +510,18 @@ locals {
     # Emails
     {
       name  = "OUTBOUND_EMAIL_ADAPTER"
-      value = "Elixir.Swoosh.Adapters.Postmark"
+      value = "Elixir.Swoosh.Adapters.Mailgun"
     },
     {
       name  = "OUTBOUND_EMAIL_FROM"
-      value = "support@firezone.dev"
+      value = "notifications@firezone.dev"
     },
     {
-      name  = "OUTBOUND_EMAIL_ADAPTER_OPTS"
-      value = "{\"api_key\":\"${var.postmark_server_api_token}\"}"
+      name = "OUTBOUND_EMAIL_ADAPTER_OPTS"
+      value = jsonencode({
+        api_key = var.mailgun_server_api_token,
+        domain  = local.tld
+      })
     },
     # Feature Flags
     {

terraform/environments/production/variables.tf

@@ -33,6 +33,10 @@ variable "postmark_server_api_token" {
   type = string
 }
 
+variable "mailgun_server_api_token" {
+  type = string
+}
+
 variable "pagerduty_auth_token" {
   type = string
 }

terraform/environments/staging/main.tf

@@ -463,16 +463,17 @@ locals {
     # Emails
     {
       name  = "OUTBOUND_EMAIL_ADAPTER"
-      value = "Elixir.Swoosh.Adapters.Postmark"
+      value = "Elixir.Swoosh.Adapters.Mailgun"
     },
     {
       name  = "OUTBOUND_EMAIL_FROM"
-      value = "support@firez.one"
+      value = "notifications@firez.one"
     },
     {
       name = "OUTBOUND_EMAIL_ADAPTER_OPTS"
       value = jsonencode({
-        api_key = var.postmark_server_api_token
+        api_key = var.mailgun_server_api_token,
+        domain  = local.tld
       })
     },
     # Feature Flags

terraform/environments/staging/variables.tf

@@ -27,3 +27,7 @@ variable "slack_alerts_auth_token" {
 variable "postmark_server_api_token" {
   type = string
 }
+
+variable "mailgun_server_api_token" {
+  type = string
+}