railsのactionmailerでメールを送れない

railsのactionmailerで非同期でメールを送信したが下記のログが出てメールが実際には届かない。

[ActiveJob] [ActionMailer::DeliveryJob] [長い数字]   Rendering notification_mailer/send_oubo_notification.text.erb within layouts/mailer
  Rendering post/oubo_done.html.erb within layouts/application
[ActiveJob] [ActionMailer::DeliveryJob] [長い数字]   Rendered notification_mailer/send_oubo_notification.text.erb within layouts/mailer (3.4ms)
[ActiveJob] [ActionMailer::DeliveryJob] [長い数字] NotificationMailer#send_oubo_notification: processed outbound mail in 105.0ms

[ActiveJob] [ActionMailer::DeliveryJob] [長い数字] Sent mail to retroround@gmail.com (1326.1ms)
[ActiveJob] [ActionMailer::DeliveryJob] [長い数字] Date: Sun, 02 Sep 2018 16:16:55 +0900
From: アドレス@gmail.com
To: アドレス@gmail.com
Message-ID: <長い数字>
Subject: 文字列
Mime-Version: 1.0
Content-Type: text/plain;
 charset=UTF-8
Content-Transfer-Encoding: base64

[ActiveJob] [ActionMailer::DeliveryJob] [長い数字] Performed ActionMailer::DeliveryJob (Job ID: 長い数字) from Async(mailers) in 1435.75ms