iRedAdmin-Pro now offers some basic RESTful APIs, please read document below for more details. If the API you're looking for is not mentioned in tutorial, don't hesitate to contact us to implement it.
http://www.iredmail.org/docs/iredadmin-pro.restful.api.html
Feedback, suggestions, feature requests are always welcome. :)
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Zhang Huangbin, founder of iRedMail project: http://www.iredmail.org/ Time zone: GMT+8 (China/Beijing).