On Thu, 16 Jun 2011 16:13:39 +0530 sachin <sachin.murudkar@xxxxxxxxxxxxx> wrote: > Hi Hagedorn > > Thanks for the reply. I need a specific system (mac address) only should > be able to use imap and pop service with the help of cyrus. Cyrus doesn't have access to that low level of data. All you will have at the Cyrus level is the remote IP address. There are various methods you can use here, including operating system level firewalls that only allow packets from particular MACs through on particular ports (i.e 143, 110). I suggest you approach the support forums for firewalls on your operating system. This is not something that we can help you with at the Cyrus level. Regards, Bron. ---- Cyrus Home Page: http://www.cyrusimap.org/ List Archives/Info: http://lists.andrew.cmu.edu/pipermail/info-cyrus/