Hi, We are currently converting from PMTA… we have a server that sends 2M messages a day (not sure if that is considered small/medium/large to this forum), and the basic specs are 4cpus, 4GB ram, 100GB disk (actual used). There are much lower than the specs recommended in the docs… can anyone share insight on whether 16GB ram and 300GB disk would be necessary for us? Thanks!
Those specs should do you fine, I would not go below them though.
KumoMTA is designed to send millions of messages per hour, millions per day isn’t a heavy load but four cores is as low as we recommend going.
Drive space is something to be aware of. KumoMTA logs are typically much larger than PMTA. That does not mean you need a bigger drive, it just means you need to be aware of the space requirements. if you use the default logging, every event of every message (r,b,t,d,) will consume about 1kb, so for good reputation mail, bank on 3kb per message of log storage over the normal system logging. You may want to limit local logging to a few days and favour webhooks.
Thank you for the guidance, web hooks make sense