Back in June of 2023 I added list.dnswl.org to postscreen.
Over time I've noticed that I get the occasional lookup error like this: postfix/dnsblog 17448 - - warning: dnsblog_query: lookup error for DNS query 137.52.152.104.list.dnswl.org: Host or domain name not found. Name service error for name=137.52.152.104.list.dnswl.org type=A: Host not found, try again As later lookups returned valid results, I had just put that down to some glitch with dnswl's servers. Yesterday I got this error for my ISP's outbound server, which I know is listed with dnswl. I thought I'd have a look at historical logs. Up to the date when I added list.dnswl.org, I had only zen.spamhaus.org in my postscreen_dnsbl_sites. Searching through my logs I see that, up until June last year, I had those same error logs but only for zen. (To be expected, given that it was the only one in use.) After that date, though, every logged error is for list.dnswl.org and there are none for zen.spamhaus.org. Just wondering why that might be. My postscreen config: postscreen_cache_map = btree:/var/db/postfix/postscreen_cache postscreen_greet_action = enforce postscreen_denylist_action = enforce postscreen_dnsbl_allowlist_threshold = -1 postscreen_dnsbl_sites = list.dnswl.org*-6, zen.spamhaus.org*2 postscreen_dnsbl_action = enforce postscreen_dnsbl_threshold = 2 -- Thanks, Phil _______________________________________________ Postfix-users mailing list -- postfix-users@postfix.org To unsubscribe send an email to postfix-users-le...@postfix.org
