On 10/25/2013 3:34 PM, Charles Marcus wrote: > On 2013-10-25 4:28 PM, Harald Koch <c...@pobox.com> wrote: >> On 25 October 2013 14:42, Charles >> Marcus <cmar...@media-brokers.com >> <mailto:cmar...@media-brokers.com>> wrote: >> >> Whether it is iOS specific or not (apparently it is, at least >> for the time being, iOS specific), it also applies to the smtp >> connection to my *postfix* server, so I disagree that it is OT. >> >> Apparently it is not a hoax, so the question remains, for >> those of us who do not have the enterprise tools to lock down >> iPhones and iPads, what is the best/most reliable way to >> simply block LinkedIn from being able to successfully connect >> to the SMTP server? >> >> >> According to the technical description, they're modifying your >> inbound email as you fetch it from your IMAP server, not your >> outbound email. > > Not according to this (from the second paragraph of the linked article): > > "Once you install the Intro app, all of your emails, both sent and > received, are transmitted via LinkedIn’s servers. LinkedIn is > forcing all your IMAP and SMTP data through their own servers and > then analyzing and scraping your emails for data pertaining > to…whatever they feel like." > > BOTH IMAP and SMTP... > > Maybe the article is wrong? > > -- > > Best regards, > > */Charles/*
The article appears to be correct. They proxy your phone's IMAP for incoming mail, and your phone's SMTP for outgoing mail. The block in postfix prevents users from sending mail via the linkedin proxy. Blocking the IMAP proxy would need to be done in your IMAP software. I suspect blocking the IMAP proxy would be sufficient to discourage folks from using this; blocking only in postfix might not be as noticeable (most folks seem to use mobile devices far more for reading than sending). Of course, if your local policy determines third-party proxying is unwanted, blocking both is best. Blackberry has done pretty much this same thing for years, and not too many people have been bent out of shape about it. Or maybe the different business model of BB convinced folks their email wasn't being mined. Mostly a moot point now... -- Noel Jones
