WASHINGTON, Nov. 15, 2016 /PRNewswire/ -- Sending email newsletters is a routine business practice for more than 80% of large organizations in the US, surpassing standalone (79%), lead nurturing (71%), and transactional (62%) emails, according to an email marketing survey from Clutch, a ratings and reviews platform for businesses. Photo - http://photos.prnewswire.com/prnh/20161114/439132-INFO Photo - http://photos.prnewswire.com/prnh/20161114/439133-INFO Most organizations send out their newsletter multiple times a week, the survey found, with Monday and Friday, between 9 and 11 AM, being the most popular periods. However, no universal rule governs when to distribute a newsletter, according to email marketing experts."We need to send [emails] when they will be at the top of the inbox. If the email gets buried, it is less likely to be opened and read," said Michael Barber, Founder of barber&hewitt, a strategy and planning firm focused on business-to-business (B2B) organizations.Nearly 90% of email marketers said that email personalization is important. And most of the marketers (70%), say personalization is a key part of their company's email marketing efforts - more so than segmentation, mobile optimization, and A/B testing."Email personalization has become so much more than addressing a subscriber by name," said Kayla Lewkowicz, Marketing Coordinator at Litmus , a web-based email creation, testing, and analytics platform. "Real personalization places the email communication in context with subscriber needs and delivers a relevant message at the exact time the subscriber needs it."