Hi
The logs show that Postfix does not pass the from key because the From
header comes from the message body, and Postfix by default only supports
sender information from the Envelope From (sender). Right?
I'm trying to write something "like DMARC" in Python to reject if the
From and return-path for the selected domain are different
only that much and as much as that......
I cannot find other user-friendly solutions
In debug:
sender: r...@domaintest.ltd, from: None
.....
sender: r...@domaintest.ltd, from: None, inputs: {'request':
'smtpd_access_policy', 'protocol_state': 'RCPT', 'protocol_name':
'ESMTP', 'client_address': '94.xxx.xxx.xxx', 'client_name':
'mail134.xxx.xxx.pl', 'client_port': '42647', 'reverse_client_name':
'mail134.xxx.xxxx.pl', 'server_address': 'xxx.xxx.xxx.195',
'server_port': '25', 'helo_name': 'mail134.xxx.xxx.pl', 'sender':
'r...@domaintest.ltd', 'recipient': 'm...@otherdomain.ltd',
'recipient_count': '0', 'queue_id': '', 'instance':
'177634.6749d771.94976.0', 'size': '1699', 'etrn_domain': '', 'stress':
'', 'sasl_method': '', 'sasl_username': '', 'sasl_sender': '',
'ccert_subject': '', 'ccert_issuer': '', 'ccert_fingerprint': '',
'ccert_pubkey_fingerprint': '', 'encryption_protocol': 'TLSv1.3',
'encryption_cipher': 'AECDH-AES256-SHA', 'encryption_keysize': '256',
'policy_context': ''}
Is any idea ?
Hi
I have some problem with comunications postfix + python
in main.cf:
...
smtpd_restriction_classes=testowy
testowy=check_policy_service { unix:private/testowy, timeout=4s,
default_action=DUNNO }
smtpd_recipient_restrictions =
check_recipient_access inline:{{testdomain.ltd=testowy}},
#beacuse i i try run for only one domain "testdomain.ltd"
in master.cf:
testowy unix - n n - - spawn user=nobody
argv=/usr/local/sbin/from_check.py
example script who doing nothing /usr/local/sbin/from_check.py:
#!/usr/bin/python3.9
import sys
def main():
while True:
input_line = sys.stdin.readline().strip()
if not input_line:
print()
sys.stdout.flush()
continue
print("DUNNO") # REJECT, PERMIT, DUNNO
sys.stdout.flush()
if __name__ == "__main__":
main()
in log I get:
Nov 28 13:54:15 mx postfix/smtpd[2953675]: warning: missing attribute
action in input from private/testowy
Nov 28 13:54:16 mx postfix/spawn[2953684]: warning: command
/usr/local/sbin/from_check.py exit status 120
Nov 28 13:54:16 mx postfix/smtpd[2953675]: warning: missing attribute
action in input from private/testowy
Nov 28 13:54:16 mx postfix/smtpd[2953675]: warning: problem talking
to server private/testowy: Success
I think the current script doesn't work because it doesn't read data
from Postfix or respond in the expected format.
Does anyone have an example of what it should look like?
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