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Re: Why do so few mail providers support Port 587?
On Fri, Feb 25, 2005 at 02:30:01AM -0500, Jim Popovitch wrote: > > On Thu, 2005-02-24 at 23:36 -0500, [email protected] wrote: > > > > The rest of us run mail services in the real world, where lots of users buy > > laptops, and then actually <gasp, shock> *use* the portability and thus often > > end up behind some other ISP's port-25 block. > > Why not a VPN solution. If you have mail servers that your users need, > chances are that you also have file servers, internal web servers. > calender servers, etc. Should file/web/calender servers all open one > port or internal access and a second port for authenticated external > access? That might work for corporate networks, but not for hosting providers, isps, etc. We have about 10000 domains we manage, a lot of them have active mail users. Imagine a (low) average of 5 mailboxes per domain. That would mean my team would have to support 50000 VPN connections? No thank you! Furthermore, to setup a vpn, you need extra software, there are the issues when you are behind a NAT (or even double-NAT) etc. Almost all MUA's support auth-smtp on port 587, and thus this can be used from anywere (cyber-cafe when you are on holiday, pda's, even some cellphones, ...). BTW: Belgium's two biggest isps _do_ block tcp/25 outgoing... Kind Regards, Frank Louwers -- Openminds bvba www.openminds.be Tweebruggenstraat 16 - 9000 Gent - Belgium