Email deliverability is a big issue for any business owner or online marketer who is using email as a marketing channel.
It’s important to understand “email deliverability” in context of the other email marketing metrics.
Email deliverability is the first line of defense when it comes to getting your subscribers to open your email messages and take the desired action. In other words, if the email message is not delivered in the first place, inbox vs. junk folder placement is a non-issue nor is whether or not they open the message, read it, or click on a link inside of the email message.
Via Peter Azzopardi