I don't know if other people who use sqlgrey with Postfix experience problems or not. My sister has a comcast email address, she can't email me when sqlgrey is on. I try to email gblencoe at hydrogendiscoveries.com and he can't email me back. This is even after I white listed the hydrogendiscoveries.com domain. I suspect that I need to white list the abac.com domain instead.
What are people choosing to do? I find that grey listing doesn't stop spam from coming in. I still get quite a bit of spam. I've even heard that grey listing might make the problem worse. Grey listing is a totally inclusive barrier that is easy to get around. Perhaps a smarter approach is to record any unknown source that is emailing me and if I don't put that source on a white list, sqlgrey is applied. Otherwise, sqlgrey is not applied even if the source is unknown. For repeat offenders who are sending crap you don't want and retrying, they should be 5xx'ed or better yet tar pitted. Currently, I have sqlgrey turned off and commented out in my main.cf. One way to clean up email, but the people trying to reach you won't like it, is to send a response with a link to your web site where they can authenticate their message. This breaks the way email works though and for people who are emailing you for a mailing list, it will be considered extremely rude. I guess I'm wondering if I need to grey list more aggressively? I'm thinking, if I don't white list the email source, then every time that source tries to reach me again the grey listing should get harsher. So I start out with a 5 minute delay and work my may up to say a 24 hour delay. I want to be smarter though so that the three servers serving my domain are synchronised as to the length of the delay. I'm thinking if you don't wait for the specified length of time, the delay gets longer. So in all honesty, does grey listing make the spam problem worse? Grey listing slows everything down and unfortunately, some legitimate email sources aren't compatible with delay schemes. With spammers retrying, grey listing is totally defeated. Will delay tactics, short of black listing, stop spammers? Like I said, I don't know what to do with sqlgrey so I have turned it off. _______________________________________________ PLUG mailing list [email protected] http://lists.pdxlinux.org/mailman/listinfo/plug
