Hello everyone,
While running my milter, I noticed an inconsistency filtering incoming mail by
their connection information and by inconsistency I mean complete lack of data.
Of course it could be a bug in my milter, but in case it is not, here is the
problem:
A normal (unencrypted) connection results in postfix providing me with the
following macros:
"macros": {
"C": {
"j": "my.server.tld",
"_": "unknown [185.254.37.110]",
"daemon_name": "my.server.tld"
},
"H": [],
"M": [],
"R": {
"rcpt_addr": "[email protected]",
"rcpt_host": "unix:private\/dovecot-lmtp",
"rcpt_mailer": "lmtp"
},
"L": {
"i": "40ADA4138A"
},
"E": {
"i": "40ADA4138A"
}
},
"connection": {
"hostname": "[185.254.37.110]",
"protocolFamily": "4",
"port": 51673,
"address": "185.254.37.110"
},
"helo": "citibanamex.com",
Notice how the "C" macro is populated and the "connection" (SMFIC_CONNECT)
information is also fully populated. All normal so far.
But, the next email is different:
"macros": {
"H": {
"tls_version": "TLSv1.2",
"cipher": "ECDHE-ECDSA-AES256-GCM-SHA384",
"cipher_bits": "256"
},
"M": [],
"R": {
"rcpt_addr": "[email protected]",
"rcpt_host": "unix:private\/dovecot-lmtp",
"rcpt_mailer": "lmtp"
},
"L": {
"i": "4BFAF44FFA"
},
"E": {
"i": "4BFAF44FFA"
}
},
"connection": {
"hostname": "",
"protocolFamily": "",
"port": 0,
"address": ""
},
"helo": "fquznon.cn",
Now notice how the "C" macro is not sent and the "connection" (SMFIC_CONNECT)
information is completely empty, but the TLS information "H" is now populated.
What causes postfix to not provide any connection information when the
connection changed to encrypted?
I would appreciate some ideas.
Thank you.
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