08.02.2023 12:14, Viktor Dukhovni wrote:
..
    /etc/postfix/sender-access:
        top     REJECT I employ crude anti-spam measures
        .top    REJECT I employ crude anti-spam measures

On 18.02.23 09:34, Michael Tokarev wrote:
I wonder how effective to block just the TLDs. I guess it is zero, no?

guys use this because many people use parent_domain_matches_subdomains to contain smtpd_access_maps, even when it's discouraged:

http://www.postfix.org/postconf.5.html#parent_domain_matches_subdomains

I *guess* foo@top shouldn't really work, as it is non-fqdn in terms of
postfix, and is blocked by, say, reject_non_fqdn_sender.

So only entries like .top (with the leading dot) are needed here
(± the context, which is about how good it is to block-by-tld).

.top only works when parent_domain_matches_subdomains does NOT contain smtpd_access_maps:

http://www.postfix.org/access.5.html


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