Qmail Toaster wrote:
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.
Same here. I've got my blacklists file pruned down to: -r zen.spamhaus.org -r relays.ordb.org -r list.dsbl.org -r cbl.abuseat.org And I'm noticing up to 30 second delays when sending emails from TB.To reduce the timeout.... It's been discussed int he past, and I believe you'd have to edit the source to accomplish this. As far as adding your servers to an exclude list, sure. Add them to the /etc/tcprules.d/tcp.smtp file (towards the top) and then rebuild the cdb.
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