I don't think there is anything in POP that makes the client pop a warning. Cheapest way is to write something that reads the log file and mail warnings or do your desired actions to offenders.
Jeremy Kister wrote: >Hi > >I've got vpopmail 5.2.1 on top of qmail 1.03 on a Solaris 2.7 SPARC machine. > >Everything is going well. I've noticed, though, that several of my users >are abusing my pop3 service, that is, that they are popping their email >every minute, 24 hours a day. > >this has not become a problem for my mail server performance as of yet, but >i'm being pro active. It is clearly stated in my aup that checking your >mail more than once every 5 minutes is unacceptable, and that once (or less >than) every 10 minutes is preferred. > >I'm wondering if anybody has implemented a method of making vchkpw only >allow one authentication per user per 5 minutes.. > >I'm looking for something that will not silently deny their connection, but >something that will actually make their mail client do something like pop up >a message, or pop up a username and password window.. just so that the >client knows that he's doing something wrong. > > >------------------------------------------------------------------- >Jeremy Kister >www.jeremykister.com >PGP: http://www.jeremykister.com/jeremy/public_key.asc >------------------------------------------------------------------- > > >