DAve wrote: > Ed Russell wrote: > > > > No user verification or RBL at the MTA level. > > Absolutely do user verification. I can throw out from 20% to 80% of my > traffic depending on the current level of dictionary and Joe-Job > attacks. Since you are processing ahead of your clients Exchange boxes > I'm not sure how you can do that with qmail. I do it on my gateways > running MailScanner via milter-ahead, and on my toasters via checkuser > in vpopmail. > > There might be a way to get qmail to check with an Exchange box to > validate a user without running vpopmail, but I won't know it.
IIRC, Exchange can act as an LDAP server, so you may be able to do user verification via LDAP lookups. -- Bowie
