1-
2- configure SMTP certificate in trust store by following steps:
- Retrieve certificate for smtp.gmail.com using OpenSSL
- Create a text file with only the certificate
- Load the certificate into the keystore
- Restart WebLogic Domain
https://technology.amis.nl/2014/08/05/setup-gmail-as-mail-provider-for-soa-suite-12c-configure-smtp-certificate-in-trust-store/