OS X Server: iCalendar Message-Based Interoperability Protocol (iMIP) support

The Calendar service in OS X Server can support email invitations via iCalendar Message-Based Interoperability Protocol (iMIP).

The supported IMAP email invitations require the server to have access to an IMAP server for incoming mail and an SMTP server for outbound mail.

The incoming IMAP email service must support "plus addressing". This refers to adding a plus (+) sign and a tag to the name portion of the email address to create a sub-address that the Calendar Server uses to recognize an invitation reply.

If invitation responses are not being acknowledged by the Calendar Server, please check with your ISP (Internet Service Provider) to verify that plus addressing is supported through their mail servers.

The IMAP account used for this purpose should be dedicated solely to the calendar server; other incoming emails will be discarded.


Important: Mention of third-party websites and products is for informational purposes only and constitutes neither an endorsement nor a recommendation. Apple assumes no responsibility with regard to the selection, performance or use of information or products found at third-party websites. Apple provides this only as a convenience to our users. Apple has not tested the information found on these sites and makes no representations regarding its accuracy or reliability. There are risks inherent in the use of any information or products found on the Internet, and Apple assumes no responsibility in this regard. Please understand that a third-party site is independent from Apple and that Apple has no control over the content on that website. Please contact the vendor for additional information.
Last Modified: Nov 18, 2013
Not helpful Somewhat helpful Helpful Very helpful Solved my problem
Print this page
  • Last Modified: Nov 18, 2013
  • Article: HT5108
  • Views:

  • Rating:
    • 60.0

    (468 Responses)

Additional Product Support Information

Start a Discussion
in Apple Support Communities
See all questions on this article See all questions I have asked