natan via Postfix-users:
> 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
from_check.py should receive requests and send responses as described in
https://www.postfix.org/SMTPD_POLICY_README.html#protocol:
1 - Receive lines formatted as name=value, followed by an empty line.
2 - Reply with ONE LINE containing action=name-of-action, followed by an empty
line.
3) It should not terminate, but wait for another request, and terminate
after it receives EOF.
> 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()
This program does not do [1]: reply after an empty input line.
Instead, it replies after every input line.
This program does not do [2]: reply with action=value.
This program does not do [3]: terminate after EOF on input. Instead,
it goes into an infinite loop, printing empty lines.
You should test your program without Postfix first.
Wietse
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