Most popular email marketing services offer functionality that strikes a recipient from a list once a certain number of emails to a specific recipient ‘bounced’ back as undeliverable. Don’t be overeager to remove a subscriber, though; there are valid reasons why an email cannot be delivered. Consider only removing such a subscriber after four or five “bounces”.

Pam Neely has been marketing online for 15 years. She's a serial entrepreneur and an avid email and content marketing enthusiast with a background in publishing and journalism, including a New York Press Award. Her book "50 Ways to Build Your Email Marketing List" is available on Amazon.com. Pam holds a Master's Degree in Direct and Interactive Marketing from New York University. Follow her on Twitter @pamellaneely.
Electronic mailing list servers may be set to forward messages to subscribers of a particular mailing list either individually as they are received by the list server, or in digest form in which all messages received on a particular day by the list server are combined into one email that is sent once per day to subscribers. Some mailing lists allow individual subscribers to decide how they prefer to receive messages from the list server (individual or digest).[2]
While getting the word out to many people at once can seem appealing, it also lacks the personalization that today’s online consumers crave. And with today’s email marketing services that make it simple to segment and personalize your messages, there’s no reason not to dip your toe into the email customization waters, right? Plus, as laws change around the world to make unsolicited electronic messages illegal, one wrong email could land your business squarely in the red.
As opposed to static messaging, chat advertising refers to real time messages dropped to users on certain sites. This is done by the usage of live chat software or tracking applications installed within certain websites with the operating personnel behind the site often dropping adverts on the traffic surfing around the sites. In reality this is a subset of the email advertising but different because of its time window. http://www.digitalvidya.com/wp-content/uploads/2014/12/email-campaign.jpg
An omni-channel approach not only benefits consumers but also benefits business bottom line: Research suggests that customers spend more than double when purchasing through an omni-channel retailer as opposed to a single-channel retailer, and are often more loyal. This could be due to the ease of purchase and the wider availability of products.[24]
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