On 2011-09-01 at 11:05 -0700, Jeff Lasman wrote: > # Accept hosts who are polite enough to wait rather than just send, as > spammers do > accept hosts = * > delay = 3s
> Is there a community concensus on whether or no this is reasonable? This is email. There's no community consensus on _anything_. That said, I am one of those who does a delay, to expose the protocol pumpers which don't synchronise correctly. Make sure to whitelist your monitoring system. It's also handy to whitelist all IPs configured on this host: @[] What I do reduces down to: acl_connect: accept hosts = @[] : +remote_hosts_nodelay warn set acl_c_delay = 0 # ... warn set acl_c_delay = ${eval10:3+$acl_c_delay} # add 2 seconds if on an RBL, etc etc # No delays at connect for submission, it's in the user-path: accept condition = ${if =={$received_port}{587}} accept hosts = * delay = ${acl_c_delay}s together with a hostlist "remote_hosts_nodelay" which includes +relay_from_hosts. The real ACL is more complex than that, because that's how I roll. Arguably, you might use a DNS reputation whitelist to reset the delay down to zero before the end there. You'll probably want to end up whitelisting the high-volume senders you trust, if you want to keep them happy. -Phil -- ## List details at https://lists.exim.org/mailman/listinfo/exim-users ## Exim details at http://www.exim.org/ ## Please use the Wiki with this list - http://wiki.exim.org/