SMTP authentication for broadband providers
Suresh Ramasubramanian
suresh at outblaze.com
Thu Feb 12 01:48:18 UTC 2004
Will Yardley wrote:
> My understanding is that in most cases, providers are blocking port 25
> outbound to prevent direct to MX spamming from their customers' machines
If you do that, please put in a corresponding ACL to block port 25
inbound _and_ outbound.
Otherwise, you just might get bitten by something like spoofed source
routing, as several providers have found out in the past.
srs
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