Monday is the best day to launch an email marketing campaign, according to a new report from MailerMailer. The "Email Marketing Metrics Report" which analyzed more than 1.1 billion emails sent in 2014, found that Monday emails were opened on average of 12.6% during the first half of the year and 13.6% during the second half of the year. Saturday and Sunday saw the lowest average open rates at 11% during the first half of the year and 10% at the second half.

A new spam email campaign claiming to come from UPS is in circulation. The emails look like legitimate delivery notification messages but contain word documents with malware in the attachments. Users that download the faulty files will be installing malicious code onto their computers.

Email design testing firm Litmus has raised $49 million in private equity from Spectrum Equity. This is the company's only outside funding beyond a GBP10,000 bank loan from when the company was founded more than ten years ago in London. The company will use the funding to develop its product further and "create the next big innovation" according to Litmus CEO Paul Farnell.

CIA Director John Brennan is outraged by the hack of his personal email account. On Tuesday, Brennan spoke publicly about the attack and said that is an illustration of the national security issues in the modern age. "I was certainly outraged by it," he said at an intelligence conference at George Washington University.

Agencies are almost 50% more likely to garner "excellent" ROI from email campaigns, according to a new report from Econsultancy & Adestra. The researchers interviewed more than 1,000 in-house and agency digital marketers and found that 51% of email agencies rated their campaigns as "excellent" or "good," while only 41% of brand marketers said their emails delivered ideal results.

Emails offering a percent-off are more effective than those offering dollar-off deals, according to a new report from retention marketing firm Retention Science. The researchers analyzed more than one billion marketing emails and discovered that customers are 38% more likely to click, and 47% more likely to convert when they see a percentage-off offer.

British newspaper "The Guardian" has exposed the email addresses of 501 beta testers of its anticipated mobile app. The mistake took place when the publication sent an email ccing all parties instead of bccing recipients. The email welcomed the new participants into the program and explained what they had to look forward to.

The Ohio State Department of Public Safety has sent an email to students, staff and faculty after the university an anonymous "threat of violence to the campus community" was posted online. The email didn't give much detail, but urged attendees to be cautious. "It is out of an abundance of caution that we share this information and remind everyone to be observant and aware," read the email.

Forbes has opened its email time capsule after 10 years. Ten years ago, more than 140,000 Forbes readers wrote an email to their future self, and those emails are about to land in their inboxes. The publication is currently in the process of sending these emails from 2005.

It's been almost two years since Home Depot was hit with a massive data breach, but the company is still dealing with the aftermath. The company is fighting more than 50 class-action lawsuits from consumers and financial institutions, and may settle some of the suits to avoid bad publicity. So far the company has spent $232 million in expenses from the security breach, and that number is expected to grow. The company has a $100 million insurance policy for network security and privacy liability.