OJS on GCE send mail

 OJS 如果架在 GCE 上，會因為 GCE 擋掉 SMTP 的功能，

因此需要透過第三方服務來發信，以下為利用 Sendgrid 來達到寄信功能。

1. Sendgrid 有兩件事要做
1. 取得Sendgrid API KEY：只要有寄信權限就好
2. 設定DNS授權：
   https://docs.sendgrid.com/ui/account-and-settings/how-to-set-up-domain-authentication
2. OJS
1. config.inc.php要修改一下設定
   

   smtp = On

   SMTP server settings
   smtp_server = smtp.sendgrid.net
   smtp_port = 587
   smtp_auth = tls
   smtp_username = apikey
   smtp_password = pass
   smtp_suppress_cert_check = On
   allow_envelope_sender = On
   default_envelope_sender = youremail@domain.com
   force_default_envelope_sender = On
   force_dmarc_compliant_from = On
   

   dmarc_compliant_from_displayname = ‘%n’
   time_between_emails = 3600
   max_recipients = 10
   require_validation = Off
   validation_timeout = 14

2. 
   

參考資料：

• https://forum.pkp.sfu.ca/t/cant-setup-custom-email-using-sendgrid-instead-of-inbuilt-phpmailer/63316/9
• https://jclassroom.net/setting-mail-smtp-for-wordpress/