> Does anyone use a spam-filtering solution they think is accurate > enough to use with a business email address? I'm getting tons of spam > and I'd really like to try and filter it out, but I need to make sure > I don't miss any legitimate email. I'm using postfix and > courier-imap. > > - GrantGreylisting because it doesn't filter anything it merely delays email with a temp 450 error. Real emails retry after an interval and spam does not so it eliminates about 90-95%. Couple with reasonable Postfix checks like making sure the sender domain exists, etc and a mail client with internal filtering. With the above in place I see maybe 1-2 actual spams in my inbox a week and averaging about eight a day in my spam folder. Postgrey is in portage and it'll take you about almost two full minutes to get setup and working. I suggest making the the greylist time 30 seconds and the whitelist time 32 days. kashani
That sounds really nice. Would you say sending back a 450 error is 100% reliable? Which config option makes postfix check to see if the sender domain exists. I can't find it in /etc/postfix/main.cf. - Grant -- [email protected] mailing list
