mailbox_size_limit and message_size_limit

[indie1982]

Just before I go ahead and do so, is it safe for me to just add mailbox_size_limit and message_size_limit directives to the bottom of the /etc/postfix/main.cf file?

I've noticed that they don't already exist, so what are the defaults? I can see message size is 10MB (ehlo localhost) but can't see the default for mailbox size.

Do these settings have to be system wide?

indie

[till]

Yes, its safe.

I've noticed that they don't already exist, so what are the defaults?

postconf -d | grep size

Do these settings have to be system wide?

Yes.