When Hillary Rodham Clinton last campaigned for president, she had a robust email list.

Emailing U.S. representatives and senators is surprisingly difficult in this day and age.

Spam emails are at an all time low.

British telecom group TalkTalk is having email woes. The company's network has locked hundreds of customers out of their email accounts after the company tried to clean up its network and deactivate legacy addresses. Customers complained about the issue on the company's forum. The issue affects email addresses that were acquired when TalkTalk bought Tiscali and Lineone.

If you receive emails from Best Buy and want to get off of the list, that could be tricky.

Microsoft's Office 365 email service experienced an outage for some users yesterday. According to reports recorded on the site DownDetector.com, some users in Southern California could not send or receive emails yesterday afternoon. A smaller number of users in New Mexico, Kansas and Utah also experienced email outages. Some individuals also had issues with calendaring features. The service appears to have been restored.

PowerInbox, a company that sells real-time personalized email tools, is bringing content recommendation engines to email. The new feature will be added to the company's flagship RevenueStripe product. The company launched last summer and since these powers 1.5 billion emails a month. Clients include: Ziff Davis, Prime Publishing and Hearst.

Airline miles and hotel points are being stolen by scammers, according to a new report from security firm Agari. The company's State of Email Trust Report found that the travel industry is one of the most vulnerable industries to hacking as criminals have found ways to monetize a these loyalty points after stealing login and password details.

Job search site TheLadders.com has improved its email program and increased its email volume by graduating from its in-house infrastructure and working with email services firm SendGrid. The company began building out its new program back in 2014, after its site grew and its home-made system couldn't support the volume of emails it was sending to its eight million professional users. After the migration, the site now sends more than 170 million transactional, triggered and newsletter emails and has improved its deliverability at the same time.

Triggered emails drive more actions than typical business-as-usual emails, according to a new report from Epsilon. The report revealed that while triggered emails account for less than 5 percent of volume, triggered emails saw 53 percent open rates in Q1, as compared to business as usual emails which only garnered an average of 30 percent open rate.