we have a problem with the SMTP_BLOCK feature on some CentOS 7 servers.
Our SMTP_BLOCK config:
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SMTP_BLOCK = "1"
SMTP_ALLOWLOCAL = "1"
SMTP_REDIRECT = "0"
SMTP_PORTS = "25"
SMTP_ALLOWUSER = "cpanel"
SMTP_ALLOWGROUP = "mail,mailman"
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2 0 0 ACCEPT tcp -- * * 0.0.0.0/0 0.0.0.0/0 multiport dports 25 owner GID match 206
3 0 0 ACCEPT tcp -- * * 0.0.0.0/0 0.0.0.0/0 multiport dports 25 owner GID match 12
4 0 0 ACCEPT tcp -- * * 0.0.0.0/0 0.0.0.0/0 multiport dports 25 owner UID match 201
5 0 0 ACCEPT tcp -- * * 0.0.0.0/0 0.0.0.0/0 multiport dports 25 owner UID match 0
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0 0 ACCEPT tcp -- * * 0.0.0.0/0 0.0.0.0/0 multiport dports 25,465,587 owner GID match 206
3363 5435K ACCEPT tcp -- * * 0.0.0.0/0 0.0.0.0/0 multiport dports 25,465,587 owner GID match 12
0 0 ACCEPT tcp -- * * 0.0.0.0/0 127.0.0.1 multiport dports 25,465,587 owner UID match 201
654 57680 ACCEPT tcp -- * * 0.0.0.0/0 0.0.0.0/0 multiport dports 25,465,587 owner UID match 0
Our csf version is 9.27.
Do you have any idea what's going wrong?