Ever since my last upgrade to the latest version to the qmail I've been noticing a lot more latency with smtp connections. Sometimes taking up to 3 minutes to make an SMTP connection. I finally narrowed it down to the recent addition of dnsbl.antispam.or.id to the blacklists file. This RBL server is consistently slow and sometimes down, like this morning. Now I understand before a server can make an SMTP connection it must go through each of the RBL servers in the blacklist file. If one of the RBL servers is down, the connection must wait until it times out before it can continue on to the next RBL server in the list. My questions:
1) Is there a way to reduce the timeout period on the RBL servers? 2) Is there a way to add my internal servers to a whitelist of some sort, so those IPs don't get run through the RBL server list? The IP block is currently added in the tcp.smtp file. Thanks in advance.
