Watchdog group Eye on Sacramento is suing the city and has asked for a temporary restraining order in a move to stop city officials from deleting emails. The lawsuit aimed to stop the city's plans to delete emails two years or older that are referred to as "transitory" or "irrelevant" to the public record.

Email open rates on mobile devices are up in the UK. Seventy-one percent of all email opens in the UK during Q1 2015 took place on mobile devices, according to Movable Ink. Smartphones made up 42 percent of these opens. iPhones accounted for more than one-third of all email opens.

Hilton Hotels saw 50 percent plus open rates with their Independence Day emails, according to new data from eDataSource. The latest research revealed that marketers sent out more than 7,500 Fourth of July-themed email efforts over the last four weeks. Only 1,320 of those messages mentioned the holiday in subject lines according to the data which analyzed 25 million emails sent by 50,000 brands.

The more emails that a company sends, the more likely customers were to open those emails and make a purchase, according to a new study from Return Path. They only started to complain after they received more than five emails. The research examined 600,000 emails and found that primary subscribers who received three emails a week instead of two opened 43 percent more in aggregate.

Harvard University has revealed that a threat to its computer networks back in June. The exposure, which was made June 19, affects eight colleges and administrations. The University is calling anyone affiliated with Harvard Graduate School of Education, Harvard John A. Paulson School of Engineering and Applied Sciences, or Harvard T.H. Chan School of Public Health to change their email address.

How do agency creatives sign emails? According to DigiDay, Gerry Graf, founder and chief creative officer at Barton F. Graf 9000 writes, "Sent from my G Phone." Noel Cottrell, chief creative officer, Fitzgerald & Co. signs off with, "7ft4in 520lb Has A Posse." Alan Cohen, co-founder at Giant Spoon writes, "Sorry my watch can't talk right now."

Mailman, an email paywall system, has won Coinbase's hackathon. The platform uses the blockchain to filter spam messages and rewards consumers in bit coin. The company received a $10,000 prize in bit coin as well as a place on Boost VC's bitcoin accelerator class.

Nevada Assembly Speaker John Hambrick has reported that his personal email account was hacked. The account was taken over last week and sent out emails from his address claiming that he was stranded in Ukraine and needed money. Hambrick did not send the email and has changed his passwords in order to lock out the hackers.

The city of McKinney, Texas has admitted that a public records request for an email was not meant to cost almost $80,000. Gawker Media writer Andy Cush had requested city emails regarding a controversial incident between police and youth that went viral online. Cush requested the document citing The Texas Public Information Act and was told the job would require 2,231 hours of programmer time costing $79,229.09. "The cost estimate was reached by mistake and should never have been communicated to you as a requestor for public records," the city spokesperson wrote in a letter to Cush.

Premium denim vendor Joe's Jeans Inc has added personalization to its site browsing experience, as well as to email in order to drive conversation. Through a partnership with marketing services firm Certona, Joe's Jeans uses data based on a customer's browse behavior and previous purchases to deliver relevant products. The retailer has also been promoting its "Style Finder" tool via email. These emails, which aim to help customers find the right pair of jeans, lead to an average browse session duration is 225 percent longer than the brand's average site visit.