On Wed, 7 Jun 2017, at 07:53 AM, José Enrique Llopis wrote:
Honestly I think it would be best not to use GMAIL but to use external SMTP
+1
If you're doing bulk emailing, use a service that's intended for bulk emailing. Mailjet is $7.49 US a month for 30,000 emails with no throttling involved. It's not going to break the bank. Plus you get all the analytics, tracking of opened mails, tracking of bounces, queuing, retries. You will need to set up DKIM and SPF for the domains but this means you won't end up with the domain blacklisted.