Security

Over the past decade, Twilio SendGrid has embraced Transport Layer Security (TLS) encryption as a way to protect outbound emails as these travel between servers. In a digital world rife with cyberattacks, implementing true end-to-end email encryption for sensitive emails has become increasingly necessary. But what exactly does this mean? This post provides an overview […] The post Paranoid Email: End-to-End Encryption Primer appeared first on SendGrid.

Email privacy and security are vital to your business. Learn how to promote email security awareness within your organization. The post Email Privacy and Security for Businesses: Everything to Know appeared first on SendGrid.

Rackspace appears to have suffered a security issue related to their Hosted Exchange mailbox environment, starting on December 2nd. You can find more information here, here and here.From what I can tell, their Hosted Exchange systems make up only a small portion of the overall mailbox provider infrastructure hosted by Rackspace. Doing a quick check against the top 10 million domains suggests that the vast majority of mail traffic to Rackspace is handled by their non-Exchange infrastructure. Less than 1% of the Rackspace-hosted domains in the top 10 million domains point at the affected Exchange services. Rackspace’s MX records typically look like mx*.emailsrvr.com for non-Exchange-using domains, and mex*.emailsrvr.com for Hosted Exchange infrastructure-using customers.Sender impact is thus likely to be small — you’ll see a bit of bouncing at a handful of affected domains, as they’re not able to accept mail at this time. If you’re a mail/IT admin at an

Presentation about DMARC Terry Zink did at 2014 Virus Bulletin conference in Seattle.