delay delivery to certain mailboxes

Greetings,

in contrast to most ppl asking about delays I wish to get the exact
opposite:

I want to delay the delivery to a few special mailboxes.

example
-------
2 mailboxes: example1 and example2

When mail for example1 arrives I want to deliver immediately, which is
normally no problem because it's default.
When mail for example2 arrives I want to set a delay of 1h before the
mail gets delivered to the mailbox.

How to do this?

If it's of interest or maybe helps in any way: using postfix in
conjunction with cyrus-imap, amavis and spamassassin on RedHat9.

Thanks for your help,
Thoralf Will