On 7/16/07, Matthias Schmidt [c] <[EMAIL PROTECTED]> wrote:
I know that ..... I just meant it's not possible in the real world to prevent "clients" from talking to port 25 (of course as long as it is not closed by some isp) or to distinguish a mail-bot from a real server just through the port they talk to.
Block the port, offer a web based client and open port 587 to the world, authentication required. Simple.
the suggestion from Forrest has indeed some charme. But how to "teach" a whole bunch of DAUs to set their mail client to use port 587 instead of the default set port 25?
That requires a commitment by the ISP in question, I believe the first step is to make sure any new customers are set up for port 587 when they sign up. Change any reference material, instructions, etc. The second step is to email all existing customers and set up some sort of timetable. Let them know about the impending change and point them at detailed instructions to make the necessary changes on their computer. And lastly, start working with the customers that call in and can't read simple instructions. This is probably the hardest part because it's the most time consuming. Once the day has arrived to make the change, make it and prepare for the barrage of support calls that will be coming in. Some people will be upset about it, but that's life. Overall, it's just a commitment and time issue. Make the commitment, commit the time needed.
Thanks and all the best Matthias -- --------------------- [ SECURITY NOTICE ] --------------------- To: [EMAIL PROTECTED] For your security, [EMAIL PROTECTED] digitally signed this message on 16 July 2007 at 14:15:19 UTC. Verify this digital signature at http://www.ciphire.com/verify. ---------------- [ CIPHIRE DIGITAL SIGNATURE ] ---------------- Q2lwaGlyZSBTaWcuAjh1c2Vyc0BzcGFtYXNzYXNzaW4uYXBhY2hlLm9yZwBiZXRh QGFkbWlsb24ubmV0AGVtYWlsIGJvZHkABgcAAHwAfAAAAAEAAAB3fZtGBgcAAF8C AAIAAgACACD9Ai21V8oDfBQZmyrLTAeiXFHYXrdeSBX/+DEIczVg3QEADr+4K2c1 G+FkDKuvQ5xCTjUVBh0UyHH72UGj6mtz5nYjlUEJoNgP9ebYb5GrX+H0xYfag1EA QNL7PaGtiHvp04nmU2lnRW5k ------------------ [ END DIGITAL SIGNATURE ] ------------------
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