Is split cleanup really needed?

[Shaun T. Erickson]

I'm rebuilding my postfix installation from scratch. In the past, I've
split cleanup in two, to prevent address rewriting until after
filtering:

pre-cleanup  unix n     -       n       -       0       cleanup
    -o virtual_alias_maps=
    -o canonical_maps=
    -o sender_canonical_maps=
    -o recipient_canonical_maps=
    -o masquerade_domains=

and

cleanup   unix  n       -       n       -       0       cleanup
    -o mime_header_checks=
    -o nested_header_checks=
    -o body_checks=
    -o header_checks=

I don't really see this documented anywhere though. What I do see
documented is adding:

receive_override_options = no_address_mappings

to the before-filter smtpd and

receive_override_options = no_unknown_recipient_checks, no_header_body_checks

to the after-filter smtpd.

These two methods seem equivalent (are they?) and I think my use of a
split cleanup is a holdover from the pre-2.1 days. Is the second way
now the "proper" way to do this?

-- 
        -ste