Hey there! I’m looking to host a Mailcow instance with up to 16000 mailboxes (and growing), of which probably only 2000 are used and I don’t really get the documentation. It seems like most RAM is being consumed by ActiveSync connections, right? What RAM usage should I expect in a standard configuration and is there any way to stop exceeding concurrent connections? I can scale to up to 128GB RAM but I don’t wanna pay for more than I need. Is there any way to stay below 32GB with that mass of mailboxes?
Currently, I have a standard setup with Postfix, Dovecot, SpamAssassin and OpenDKIM. Server with 2000 active mailboxes and 8GB RAM works perfectly fine, without reboots.
Thanks in advance!