On 7/15/2011 3:15 PM, l...@airstreamcomm.net wrote: > To summarize, we think SMTP Auth is the simplest and most useful way to > allow people to send mail through our outbound mail system, and we are > hoping to get some feedback from the community regarding this perspective.
If I understand your architecture correctly, doing this won't stop bot infected PCs from sending spam as that is almost always direct to MX. Preventing customers, at the router/firewall(s) from making direct outbound connection to remote TCP 25, and forcing them to relay through your auth server, is what stops the bot spam. For customers intentionally sending spam either newbies spamming from Outlook Express to customers with full up snowshoe servers, forcing SMTP AUTH may prove advantageous, for the reasons you stated. -- Stan
