Interestingly, for me, sending emails only works when I’m sending a smaller quantity of emails. When I have a large volume of emails, like 400 or 8,000 emails, I can’t send the articles to users’ emails. I get the following warning: Uh-oh. Your post has been published but the email failed to send.
An unexpected error occurred, please retry sending your newsletter.
If the error persists, please verify your email settings.
