We are currently using SendGrid API to send transactional emails. This is very slow and it freezes the process. How do you send out 5000+ emails on a WordPress site?
We are currently using SendGrid API to send transactional emails. This overrides the
wp_mail() and uses sendgrid to actually send the email instead of php mail.
Our current issue is when we use SendGrid, it processes the emails one by one and the
wp_mail() function slows down and waits for it to finish before proceeding. This makes the sending out emails very slow, even with just 300+ email addresses, it takes around 5 minutes of loading time.
To anyone who already experienced this, what do you use to send out thousands of emails via WP fast? We already tried mailchimp but mailchimp does not have transactional emails functionality.