myrdhin bzh put forth on 3/7/2011 1:53 AM: > No, it's not SPAM.
Ok, agreed, not spam. > In fact, zeDomain.tld is a french know domain : wanadoo.fr (and orange.fr). > :( The same 10 servers handle mail for both wanadoo.fr and orange.fr. All Postfix controls relevant to your issue available in 2.1.5 are based on connection concurrency, not rate limiting. The connection concurrency is on a *per domain* basis. Orange is the largest ISP in France, yes? How many other recipient domains you send mail to are also hosted by this same Orange 10 server mail farm? If your answer is "a lot", you could completely disable concurrency and still possibly trip their 3 connections per server limit, simply due to the number of recipient domains for which you have mail queued. They didn't list them in the same order, but if you sort them you'll see it's the same 10 servers. smtp.wanadoo.fr. 600 IN A 80.12.242.62 smtp.wanadoo.fr. 600 IN A 80.12.242.148 smtp.wanadoo.fr. 600 IN A 193.252.22.65 smtp.wanadoo.fr. 600 IN A 193.252.23.67 smtp.wanadoo.fr. 600 IN A 80.12.242.9 smtp.wanadoo.fr. 600 IN A 80.12.242.53 smtp.wanadoo.fr. 600 IN A 80.12.242.142 smtp.wanadoo.fr. 600 IN A 80.12.242.82 smtp.wanadoo.fr. 600 IN A 193.252.22.92 smtp.wanadoo.fr. 600 IN A 80.12.242.15 smtp-in.orange.fr. 600 IN A 80.12.242.148 smtp-in.orange.fr. 600 IN A 80.12.242.53 smtp-in.orange.fr. 600 IN A 80.12.242.9 smtp-in.orange.fr. 600 IN A 193.252.23.67 smtp-in.orange.fr. 600 IN A 193.252.22.65 smtp-in.orange.fr. 600 IN A 80.12.242.142 smtp-in.orange.fr. 600 IN A 80.12.242.62 smtp-in.orange.fr. 600 IN A 80.12.242.82 smtp-in.orange.fr. 600 IN A 193.252.22.92 smtp-in.orange.fr. 600 IN A 80.12.242.15 I would suggest you grep your mail log for all outbound smtp connections to these 10 IP addresses, and document all the recipient domains. Then add all these domains to your slow transport map. If you still get those 421 errors, completely disable concurrency. If you still get the errors, you probably can't fix the problem until you upgrade to 2.5+ and have access to rate delay controls. Hope this helps. -- Stan
