With regards to the frequency, educational emails can be despatched after every two days. In case you’re advertising and marketing a large sale, you can even send as a lot of as 4 emails in the span of 24 hrs. Mailgun is another platform meant for email marketing that provides https://www.upwork.com/services/product/development-it-email-deliverability-inbox-reduce-spam-dns-issues-fixed-dkim-spf-dmarc-1378055073774727168?ref=project_share&tier=0