Hi Dave! 
Roundcube has Accessibility Guidlines available here: http://trac.roundcube.net/wiki/Dev_AccessibilityGuidelines 
I do believe that Roundcloud uses the ARIA standard set out by w3.
Sorry that I do not know much about accessibility support personally. I hope this helps, however.

Thanks.
Dylan.


---- On Fri, 30 Oct 2015 01:11:43 +0000 David Mehler <dave.mehler@gmail.com> wrote ----

Hello,

My name is Dave. I'm a blind System Administrator. I have recently set
up two email servers, one for personal the other for job-related use.
I am currently evaluating webmail clients for accessibility support to
be used by users of screen readers. I was wondering where Roundcube
was at in terms of supporting the latest accessibility standards and
if there was any way I could assist?

Thanks.
Dave.
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