On 20/01/2020 11:17, Graeme Fowler via Exim-users wrote: > Put your first SMTP server in queue only mode, using 'queue_only = true' in > your main configuration. This will prevent immediate delivery.
Other things you might consider: - if this initial system is being fed with commandline-source messages, rather than SMTP-source: use -odq for this big-batch feed. Then the entire config needs not be queue_only, leaving a lower-latency service for other work. - limit the number of concurrent connections to the smarthost in the initial system's transport. That way you automatically get queuing as soon as the peak load batch starts up. - If the messages in the batch are not personalised, use multi-recipient messages (use bcc, not cc or multiple-to - to avoid cross-recipient info leakage). This is a _big_ win for your initial-to-smarthost load. -- Cheers, Jeremy -- ## 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/
