As so often, seemingly minor questions by clients turn into opportunities for further research and follow up. In this case, it all began with an HTML-formatted e-newsletter to 5000 recipients. Several weeks later, reports came back in asking if we’d sent the newsletter.
The main problem with undelivered mails is that both sides — sender and recipient — don’t really know what happened. Was the e-mail sent? Is the task done? Was the e-mail delivered? Most recipients will never know that an e-mail flagged as spam was sent to them — they just don’t receive the e-mail. And most senders will never know that an e-mail flagged as spam wasn’t delivered — they just don’t get a response.
This article suggests over 20 bulletproof techniques, best practices and related services you can use to ensure best e-mail and newsletter delivery rates.