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1 End of Support for SMTP Authentication Using CRAM-MD5

On June 26, 2013, Aplonis will be performing a maintenance on the Cloud Mail and Microsoft Hosted Exchange environments which will remove the ability for mail clients to send mail using the legacy authentication protocol, CRAM-MD5. Once removed, a very small portion of our customers may lose the ability to send mail until their mail client's SMTP authentication method is changed.

Why is Aplonis making this change? Aplonis is continually striving to improve the quality, usability, and security of our mail offering. While CRAM-MD5 is a secure authentication protocol, the industry as a whole has been migrating away from using this mechanism. The recommended method for sending mail today is to use PLAIN/PASSWORD authentication over an SSL or TLS connection.

Will I be impacted? Our extensive testing in preparation for this maintenance has proven that the vast majority of mail clients do not use CRAM-MD5 by default. It is very difficult to pinpoint each and every mail client, version, device, etc that could be impacted, although we do know that if you are running one of the following configurations you could be impacted by this change:

- Thunderbird

- Apple Mail (Mac Mail)

- Apple devices still running legacy iOS versions (prior to IOS 6.x)

* NOTE: Customers using iPhones with Mobile Sync enabled will NOT be impacted.

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