On Tue, 20 Nov 2012, Robert A. Ober wrote:

On 11/20/12 6:29 AM, Jason Ede wrote:
 However, ISP's blocking smtp ports for suspected spammers would help...
 Ideally they'd block all traffic on port 25 or 587 not sent through their
 SMTP engine which would do some basic spam checks...
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Which might block my legitimate server and some of my clients who are on Comcast Business. This has been brought up frequently but is a bad idea. Too often folks in larger organizations forget about us little guys.

Comcast Business would probably have different default policies than Comcast Residential. Also, ISP's doing this *should* have an exception-by-request policy.

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