Ralf (on the list) offered me some advice, but I need some help
integrating this:

I want to reject email based on the senders 'From:' line ...

In other words:

From: *.msn.com
From: *.tw
From: *.kr

Ralf suggested using sender_checks and the following:

msn.com 550
.tw 550
.kr 550

...While I certainly understand this, I need some assistance in getting
this into the main.cf file (below is the important part)

smtpd_recipient_restrictions =
                permit_mynetworks,
                check_recipient_access regexp:$config_directory/recipient_checks.regexp,
                check_recipient_access dbm:/etc/postfix/override,
                check_client_access dbm:$config_directory/client_checks,
                reject_unauth_destination,
                reject_unauth_pipelining,
                reject_invalid_hostname,
                reject_non_fqdn_hostname,
                reject_non_fqdn_sender,
                reject_non_fqdn_recipient,
                reject_unknown_sender_domain,
                reject_unknown_recipient_domain,
                reject_maps_rbl,
                reject_unknown_client,
                check_relay_domains

...so where does this sender_checks fit in?

..I do have override for important emails and that MUST come first of
course...

Thanks to all in advance! I appreciate it!

Jeff

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