Hi all,

I am trying to lower the concurrency for emails sent to *.rr.com domains. I have configured the following, can anyone please tell me what I am missing? Thanks in advance!

In main.cf:

transport_maps = hash:/etc/postfix/transport
default_destination_concurrency_limit = 2
slow_destination_concurrency_limit = 1
slow_destination_rate_delay = 1s


In master.cf:
slow unix - - n - - smtp -o smtp_helo_name=<snip> -o smtp_bind_address=<snip>


In transport:
rr.com slow:
.rr.com slow:



Yet for emails that are getting sent, I am still getting the following back from the TWC mail servers:

delivery temporarily suspended: host cdptpa-pub-iedge-vip.email.rr.com[107.14.166.70] refused to talk to me: 421 4.7.1 - Connection refused - <snip> - Too many concurrent connections ( <2> ) from source IP



It seems like it just isn't matching from /etc/postfix/transport for some reason. I have remembered to do a postmap when editing that file. Anything else I've missed, or something I've misconfigured?

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