Recently, Google, Microsoft, and Yahoo and other major email providers have been implementing stricter email authentication controls. This is a good thing, as it helps to reduce the amount of spam and phishing emails that we all receive. However, it can also cause problems for legitimate email senders, such as OWASP. In the last month or so, we have experienced great difficulty in sending emails to Microsoft email addresses (Office 365, Exchange Online, Outlook, Hotmail, Live, etc). This has ...
