Google to shutter SSLv3, RC4 from SMTP servers, Gmail

Mark your calendars: Google will disable support for the RC4 stream cipher and the SSLv3 protocol on its SMTP servers and Gmail servers on June 16.

After the deadline, Google’s SMTP servers will no longer exchange mail with servers sending messages via SSLv3 and RC4. Users still using older and insecure mail clients won’t be able to send mail using Google’s SMTP servers after that date.

Most Google Apps organizations have already stopped using RC4 or SSLv3, but those on older systems have a month to update to modern Transport Layer Security configurations. However, there are plenty of systems still using SSLv3, including inbound/outbound gateways, third-party emailers, and systems using SMTP relay. Administrators should consider fully transitioning to newer standards as soon as possible.

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