Quoting Marten Lehmann: > we have used remote_max_parallel = 20 for a long time and it worked > fine. But currently we cannot deliver emails to a big German ISP > (t-online), because their mailservers respond with > > 421 IP:x.x.x.x - Maximum parallel connections for your IP-Address reached > > It seems, that are allowed to use only one connection at a time. Thats
It seems to me that there are two parallel connections allowed. Not much for a busy mail server, but you could try to contact their postmasters and get them to raise the limit. remote_max_parallel is probably not what you think it is. It controls the maximum number of connections a single message initiates, nothing more, as there is no central queue manager in Exim. If you are using queue_only, it controls the maximum number of connections a single queue runner will start. This is all written down in detail in the spec. The spec also tells you to use queue_smtp_domains (and run a queue runner fairly often) if you want multiple messages to be delivered in a single connection. -- ## List details at http://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/
