I understand I can do something like this for the entire domain, but
is it even possible to do it for a single address in the domain?
@spam_lovers_maps = ( ['sampledomain.org'] );
@bypass_spam_checks_maps = ( ['sampledomain.org'] );
Yes. The example above uses one map that is an ACL, processed by lookup_acl:
# If a list element contains a '@', the full e-mail address is compared,
# otherwise if a list element has a leading dot, the domain name part is
# matched only, and the domain as well as its subdomains can match. If
there
# is no leading dot, the domain must match exactly (subdomains do not
match).
Hence you can try '[email protected]'.