sendgird　から gmail に移行したい

本番環境をherokuからawsに変更し、デプロイしました。
メール送信も、sendgirdからgmailに変更したいと考えています。
アプリのページは表示されているのですが、新規ユーザーの登録をする際に、アカウント有効化メールを送信しようとすると、エラーになります。

config/environments/production.rb

  config.action_mailer.raise_delivery_errors = true
  config.action_mailer.delivery_method = :smtp
  config.action_mailer.default_url_options = { host: "EIP" }
  ActionMailer::Base.smtp_settings = {
    :address          => 'smtp.gmail.com',
    :port             => '587',
    :authentication   =>  :plain,
    :user_name        => 'hogehoge@gmail.com',
    :password         => '{アプリパスワード}',
  }

application_mailer.rb

class ApplicationMailer < ActionMailer::Base
  default from: 'hogehoge@example.com'
  layout 'mailer'
end

エラーコード

D, [2020-01-07T04:01:56.490187 #3790] DEBUG -- : [969eb332-a24e-4219-bdb1-73d9d64ddcaa]   ^[[1m^[[36mUser Create (0.4ms)^[[0m  ^[[1m^[[32mINSERT INTO `users` (`name`, `email`, `created_at`, `updated_at`, `password_digest`, `activation_digest`) VALUES ('あいうえお', 'hogeeehoge@gmail.com', '2020-01-07 04:01:56', '2020-01-07 04:01:56', '$2a$12$Q14WSE82Aaalnp5DgiYZ1.0rfwt5LYapFMtPscqbFJSPELUbdgL6G', '$2a$12$bm8JiJYl74Z2rS6xYGPbsOoqDQ4ewb9FrIsR1GzCgeOsET/.ZMiw6')^[[0m
D, [2020-01-07T04:01:56.492531 #3790] DEBUG -- : [969eb332-a24e-4219-bdb1-73d9d64ddcaa]   ^[[1m^[[35m (1.9ms)^[[0m  ^[[1m^[[35mCOMMIT^[[0m
I, [2020-01-07T04:01:56.493489 #3790]  INFO -- : [969eb332-a24e-4219-bdb1-73d9d64ddcaa]   Rendering user_mailer/account_activation.html.erb within layouts/mailer
I, [2020-01-07T04:01:56.493850 #3790]  INFO -- : [969eb332-a24e-4219-bdb1-73d9d64ddcaa]   Rendered user_mailer/account_activation.html.erb within layouts/mailer (Duration: 0.3ms | Allocations: 65)
I, [2020-01-07T04:01:56.494062 #3790]  INFO -- : [969eb332-a24e-4219-bdb1-73d9d64ddcaa]   Rendering user_mailer/account_activation.text.erb within layouts/mailer
I, [2020-01-07T04:01:56.494261 #3790]  INFO -- : [969eb332-a24e-4219-bdb1-73d9d64ddcaa]   Rendered user_mailer/account_activation.text.erb within layouts/mailer (Duration: 0.1ms | Allocations: 48)
D, [2020-01-07T04:01:56.495613 #3790] DEBUG -- : [969eb332-a24e-4219-bdb1-73d9d64ddcaa] UserMailer#account_activation: processed outbound mail in 2.7ms
I, [2020-01-07T04:01:57.429652 #3790]  INFO -- : [969eb332-a24e-4219-bdb1-73d9d64ddcaa] Delivered mail 5e1402b47930f_ece189c26067@ip-10-0-5-10.mail (933.9ms)
D, [2020-01-07T04:01:57.429748 #3790] DEBUG -- : [969eb332-a24e-4219-bdb1-73d9d64ddcaa] Date: Tue, 07 Jan 2020 04:01:56 +0000^M
From: noreply@example.com^M
To: hogeeehoge@gmail.com^M
Message-ID: <5e1402b47930f_ece189c26067@ip-10-0-5-10.mail>^M
Subject: =?UTF-8?Q?=E3=83=9E=E3=83=83=E3=82=B9=E3=81=82=E3=81=A3=E3=81=B7=E3=81=B8=E3=82=88=E3=81=86=E3=81=93=E3=81=9D=E3=80=82=E4=B8=8B=E8=A8=98=E3=81=AE=E3=83=AA=E3=83=B3=E3=82=AF=E3=82=92=E3=82=AF=E3=83=AA=E3=83=83=E3=82=AF=E3=81=97=E3=81=A6=E3=80=81=E6=9C=AC=E7=99=BB=E9=8C=B2=E3=82=92=E5=AE=8C=E4=BA=86=E3=81=95=E3=81=9B=E3=81=A6=E3=81=8F=E3=81=A0=E3=81=95=E3=81=84=E3=80=82?=^M
Mime-Version: 1.0^M
Content-Type: multipart/alternative;^M
 boundary="--==_mimepart_5e1402b478c36_ece189c2591e";^M
 charset=UTF-8^M
Content-Transfer-Encoding: 7bit^M
^M
^M
----==_mimepart_5e1402b478c36_ece189c2591e^M
Content-Type: text/plain;^M
 charset=UTF-8^M
Content-Transfer-Encoding: base64^M
^M
44GC44GE44GG44GI44GK5qeYDQoNCuODnuODg+OCueOBguOBo+OBt+OBuOOC^M
iOOBhuOBk+OBneOAguS4i+iomOOBruODquODs+OCr+OCkuOCr+ODquODg+OC^M
r+OBl+OBpuOAgeacrOeZu+mMsuOCkuWujOS6huOBleOBm+OBpuOBj+OBoOOB^M
leOBhOOAgg0KaHR0cDovL3RyYW5xdWlsLXNwcmluZ3MtMzMyMTQuaGVyb2t1^M
YXBwLmNvbS9hY2NvdW50X2FjdGl2YXRpb25zL1dxOEJlSXgtS3FORk5kTlpV^M
Sms4bGcvZWRpdD9lbWFpbD1ob2dlZWVob2dlJTQwZ21haWwuY29tDQoNCg==^M
^M
----==_mimepart_5e1402b478c36_ece189c2591e^M
Content-Type: text/html;^M
 charset=UTF-8^M
Content-Transfer-Encoding: base64^M
^M
PCFET0NUWVBFIGh0bWw+DQo8aHRtbD4NCiAgPGhlYWQ+DQogICAgPG1ldGEg^M
aHR0cC1lcXVpdj0iQ29udGVudC1UeXBlIiBjb250ZW50PSJ0ZXh0L2h0bWw7^M
IGNoYXJzZXQ9dXRmLTgiIC8+DQogICAgPHN0eWxlPg0KICAgICAgLyogRW1h^M
aWwgc3R5bGVzIG5lZWQgdG8gYmUgaW5saW5lICovDQogICAgPC9zdHlsZT4N^M
CiAgPC9oZWFkPg0KDQogIDxib2R5Pg0KICAgIDxoMT7jg57jg4PjgrnjgYLj^M
gaPjgbc8L2gxPg0KPHA+44GC44GE44GG44GI44GK5qeYPC9wPg0KPHA+44Oe^M
44OD44K544GC44Gj44G344G444KI44GG44GT44Gd44CC5LiL6KiY44Gu44Oq^M
44Oz44Kv44KS44Kv44Oq44OD44Kv44GX44Gm44CB5pys55m76Yyy44KS5a6M^M
5LqG44GX44Gm44GP44Gg44GV44GE44CCPC9wPg0KPGEgaHJlZj0iaHR0cDov^M
L3RyYW5xdWlsLXNwcmluZ3MtMzMyMTQuaGVyb2t1YXBwLmNvbS9hY2NvdW50^M
X2FjdGl2YXRpb25zL1dxOEJlSXgtS3FORk5kTlpVSms4bGcvZWRpdD9lbWFp^M
bD1ob2dlZWVob2dlJTQwZ21haWwuY29tIj7oqo3oqLzjgZnjgos8L2E+DQoN^M
CiAgPC9ib2R5Pg0KPC9odG1sPg0K^M
^M
----==_mimepart_5e1402b478c36_ece189c2591e--^M

I, [2020-01-07T04:01:57.429963 #3790]  INFO -- : [969eb332-a24e-4219-bdb1-73d9d64ddcaa] Completed 500 Internal Server Error in 1543ms (ActiveRecord: 2.7ms | Allocations: 6238)
F, [2020-01-07T04:01:57.430495 #3790] FATAL -- : [969eb332-a24e-4219-bdb1-73d9d64ddcaa]
[969eb332-a24e-4219-bdb1-73d9d64ddcaa] Net::SMTPFatalError (550 Unauthenticated senders not allowed
):
[969eb332-a24e-4219-bdb1-73d9d64ddcaa]
[969eb332-a24e-4219-bdb1-73d9d64ddcaa] app/controllers/users_controller.rb:24:in `create'

エラーで気になるのは、 Net::SMTPFatalError (550 Unauthenticated senders not allowed　の部分と、
application_mailer.rbで　default from: 'hogehoge@example.com'に変更しているにもかかわらず、
from noreply@example.com　になってしまうところです。
エラーの原因が分かる方、いらっしゃいませんか？