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我正在尝试编写一个使用 Swoosh 库发送电子邮件的 Elixir 代码。出于某种原因，我不断收到以下错误：-

{:error, 
 {:retries_exceeded, {:network_failure, 'smtp.gmail.com', {:error, :timeout}}}}

这就是我的终端的样子：-

C:\Users\USER\Desktop\mailapp>iex -S mix
Compiling 2 files (.ex)
Generated mailapp app
Interactive Elixir (1.5.3) - press Ctrl+C to exit (type h() ENTER for help)
iex(1)> Mailapp.UserEmail.welcome(%{name: "Name", email: "example.name@gmail.com"}) |> Mailapp.Mailer.deliver

我的config\config.exs文件如下所示：-

config :mailapp, Mailapp.Mailer,
  adapter: Swoosh.Adapters.SMTP, 
  adapter: Swoosh.Adapters.Test,
  adapter: Swoosh.Adapters.Local,
  relay: "smtp.gmail.com",
  username: "firstname.lastname",
  password: "password",
  tls: :always,
  auth: :always,
  port: 1025

我的lib\mailapp.ex文件如下所示：-

defmodule Mailapp.Mailer do
  use Swoosh.Mailer, otp_app: :mailapp
end

defmodule Mailapp.UserEmail do
  import Swoosh.Email

  def welcome(user) do
    new()
    |> to({user.name, user.email})
    |> from({"Name Name", "firstname.lastname@gmail.com"})
    |> subject("Hello")
    |> html_body("<h1>Hello #{user.name}</h1>")
    |> text_body("Hello #{user.name}\n")
  end
end

我的test\mailapp_test.exs文件如下所示：-

defmodule Mailapp.UserTest do
  use ExUnit.Case, async: true
  doctest Mailapp

  import Swoosh.TestAssertions

  test "send email on user signup" do
    user = create_user(%{username: "Name", email: "example.name@gmail.com"})
    assert_email_sent Mailapp.UserEmail.welcome(user)
  end
end

我已遵循https://github.com/swoosh/swoosh和https://hexdocs.pm/swoosh/Swoosh.html的指导方针，但我一直收到此错误。有人可以帮我吗？

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