Change SMTP defaults (#4538)

* default smtp config updates

* tests

* improve SMTP_MIDDLEBOX_COMP_MODE decoding

* changelog

* format

---------

Co-authored-by: Adrian Gruntkowski <adrian.gruntkowski@gmail.com>

CHANGELOG.md

@@ -128,6 +128,8 @@ All notable changes to this project will be documented in this file.
 - Replace `CLICKHOUSE_MAX_BUFFER_SIZE` with `CLICKHOUSE_MAX_BUFFER_SIZE_BYTES`
 - Validate metric isn't queried multiple times
 - Filters in dashboard are represented by jsonurl
+- `MAILER_EMAIL` now defaults to an address built off of `BASE_URL` plausible/analytics#4538
+- default `MAILER_ADAPTER` has been changed to `Bamboo.Mua` plausible/analytics#4538
 
 ### Fixed
 - Creating many sites no longer leads to cookie overflow

config/runtime.exs

@@ -99,8 +99,8 @@ super_admin_user_ids =
   |> Enum.filter(& &1)
 
 env = get_var_from_path_or_env(config_dir, "ENVIRONMENT", "prod")
-mailer_adapter = get_var_from_path_or_env(config_dir, "MAILER_ADAPTER", "Bamboo.SMTPAdapter")
-mailer_email = get_var_from_path_or_env(config_dir, "MAILER_EMAIL", "hello@plausible.local")
+mailer_adapter = get_var_from_path_or_env(config_dir, "MAILER_ADAPTER", "Bamboo.Mua")
+mailer_email = get_var_from_path_or_env(config_dir, "MAILER_EMAIL", "plausible@#{base_url.host}")
 
 mailer_email =
   if mailer_name = get_var_from_path_or_env(config_dir, "MAILER_NAME") do
@@ -536,6 +536,13 @@ case mailer_adapter do
   "Bamboo.Mua" ->
     config :plausible, Plausible.Mailer, adapter: Bamboo.Mua
 
+    # prevents common problems with Erlang's TLS v1.3
+    middlebox_comp_mode =
+      get_var_from_path_or_env(config_dir, "SMTP_MIDDLEBOX_COMP_MODE", "false")
+
+    middlebox_comp_mode = String.to_existing_atom(middlebox_comp_mode)
+    config :plausible, Plausible.Mailer, ssl: [middlebox_comp_mode: middlebox_comp_mode]
+
     if relay = get_var_from_path_or_env(config_dir, "SMTP_HOST_ADDR") do
       port = get_int_from_path_or_env(config_dir, "SMTP_HOST_PORT", 25)
       config :plausible, Plausible.Mailer, relay: relay, port: port

test/plausible/config_test.exs

@@ -4,7 +4,14 @@ defmodule Plausible.ConfigTest do
   describe "mailer" do
     test "mailer email default" do
       env = [{"MAILER_EMAIL", nil}]
-      assert get_in(runtime_config(env), [:plausible, :mailer_email]) == "hello@plausible.local"
+      assert get_in(runtime_config(env), [:plausible, :mailer_email]) == "plausible@localhost"
+    end
+
+    test "mailer email from base url" do
+      env = [{"MAILER_EMAIL", nil}, {"BASE_URL", "https://plausible.example.com:8443"}]
+
+      assert get_in(runtime_config(env), [:plausible, :mailer_email]) ==
+               "plausible@plausible.example.com"
     end
 
     test "mailer email custom" do
@@ -16,7 +23,7 @@ defmodule Plausible.ConfigTest do
       env = [{"MAILER_EMAIL", nil}, {"MAILER_NAME", "John"}]
 
       assert get_in(runtime_config(env), [:plausible, :mailer_email]) ==
-               {"John", "hello@plausible.local"}
+               {"John", "plausible@localhost"}
 
       env = [{"MAILER_EMAIL", "custom@mailer.email"}, {"MAILER_NAME", "John"}]
 
@@ -24,21 +31,12 @@ defmodule Plausible.ConfigTest do
                {"John", "custom@mailer.email"}
     end
 
-    test "defaults to Bamboo.SMTPAdapter" do
+    test "defaults to Bamboo.Mua" do
       env = {"MAILER_ADAPTER", nil}
 
       assert get_in(runtime_config(env), [:plausible, Plausible.Mailer]) == [
-               adapter: Bamboo.SMTPAdapter,
-               server: "mail",
-               hostname: "localhost",
-               port: "25",
-               username: nil,
-               password: nil,
-               tls: :if_available,
-               allowed_tls_versions: [:tlsv1, :"tlsv1.1", :"tlsv1.2"],
-               ssl: false,
-               retries: 2,
-               no_mx_lookups: true
+               adapter: Bamboo.Mua,
+               ssl: [middlebox_comp_mode: false]
              ]
     end
 
@@ -144,7 +142,17 @@ defmodule Plausible.ConfigTest do
       env = [{"MAILER_ADAPTER", "Bamboo.Mua"}]
 
       assert get_in(runtime_config(env), [:plausible, Plausible.Mailer]) == [
-               {:adapter, Bamboo.Mua}
+               {:adapter, Bamboo.Mua},
+               {:ssl, [middlebox_comp_mode: false]}
+             ]
+    end
+
+    test "Bamboo.Mua (middlebox_comp_mode enabled)" do
+      env = [{"MAILER_ADAPTER", "Bamboo.Mua"}, {"SMTP_MIDDLEBOX_COMP_MODE", "true"}]
+
+      assert get_in(runtime_config(env), [:plausible, Plausible.Mailer]) == [
+               {:adapter, Bamboo.Mua},
+               {:ssl, [middlebox_comp_mode: true]}
              ]
     end
 
@@ -159,6 +167,7 @@ defmodule Plausible.ConfigTest do
 
       assert get_in(runtime_config(env), [:plausible, Plausible.Mailer]) == [
                {:adapter, Bamboo.Mua},
+               {:ssl, [middlebox_comp_mode: false]},
                {:relay, "localhost"},
                {:port, 2525},
                {:auth, [username: "neo", password: "one"]}
@@ -176,6 +185,7 @@ defmodule Plausible.ConfigTest do
 
       assert get_in(runtime_config(env), [:plausible, Plausible.Mailer]) == [
                adapter: Bamboo.Mua,
+               ssl: [middlebox_comp_mode: false],
                relay: "localhost",
                port: 2525
              ]