n MSA and mailstore front-end MTA that
are not the same as your Internet-facing inbound gateway. This
allows a larger message size for purely internal email.
You can also operate separate inbound and outbound MTAs (or just
Postfix instances) with separate message size limits, if it somehow
makes
Looking at message_size_limit and mailbox_size_limit, if I want to allow
internal users the ability to send 100M emails it seems like 1) applies to all
messages both in-bound and out-bound and 2) I'll need to increase
mailbox_size_limit to what factor of message_size_limit?