Avinash Pawar // Viva put forth on 11/24/2010 4:48 AM: > Hi, > > I want to put throttling in postfix. > > Throttling can be of two types : > > 1. Domain wise throttling (i.e. postfix should sent only 10 mails to > gmail.com and 20 to yahoo.com at a time) > 2. On hour basis throttling (i.e. postfix should sent only 10000 emails in 1 > hour) > > Is it possible to have such feature in postfix?
Read these: http://www.postfix.org/postconf.5.html#default_destination_rate_delay http://www.postfix.org/postconf.5.html#transport_destination_rate_delay http://www.postfix.org/postconf.5.html#transport_destination_concurrency_limit To accomplish your goals you will need to create multiple smtp servers in master.cf, one for each destination domain you wish to rate limit, specifying the appropriate parameters with "-o ". You will then create entries in transport_maps specifying that mail destined for each domain is relayed through the appropriate smtp server you defined in master.cf. I don't believe you can specify "limit to X emails per hour" but you can specify the delay period between messages. Applying simple math will get you the approximate limit per hour you desire. For instance, if you want to limit to 600 deliveries per hour to Google you would set -o transport_destination_rate_delay = 16s for your Google smtp server in master.cf. You will not likely achieve a hard limit, but you can get relatively close with this method. This has been covered here before in more detail. You may wish to search the list archives. -- Stan
