- Timo Sirainen dovecot@dovecot.org:
On Fri, 2009-06-12 at 17:54 +0200, Wolfram Schlich wrote:
Timo (and all others), what do you think about such a Postfix policy server implemented as a part of Dovecot?
Dovecot v2.0 makes this much easier, since it can be extended with any kind of external services without recompiling anything. Also v2.0 tries to be somewhat compatible with Postfix master. I've had in mind that perhaps Dovecot services could run also under Postfix master. So a quota service that could run either under Dovecot or Postfix could be useful.
I don't really have time to implement it though. You could take a look at how LMTP server is implemented and just copy&paste its important parts and make it report quota instead of doing the LMTP stuff.
What does Postfix's policy protocol look like anyway?
Quote from http://www.postfix.org/SMTPD_POLICY_README.html:
The Postfix policy delegation protocol is really simple. The client request is a sequence of name=value attributes separated by newline, and is terminated by an empty line. The server reply is one name=value attribute and it, too, is terminated by an empty line.
Here is an example of all the attributes that the Postfix SMTP server sends in a delegated SMTPD access policy request:
Postfix version 2.1 and later:
request=smtpd_access_policy
protocol_state=RCPT
protocol_name=SMTP
helo_name=some.domain.tld
queue_id=8045F2AB23
sender=foo@bar.tld
recipient=bar@foo.tld
recipient_count=0
client_address=1.2.3.4
client_name=another.domain.tld
reverse_client_name=another.domain.tld
instance=123.456.7
Postfix version 2.2 and later:
sasl_method=plain
sasl_username=you
sasl_sender=
size=12345
ccert_subject=solaris9.porcupine.org
ccert_issuer=Wietse+20Venema
ccert_fingerprint=C2:9D:F4:87:71:73:73:D9:18:E7:C2:F3:C1:DA:6E:04
Postfix version 2.3 and later:
encryption_protocol=TLSv1/SSLv3
encryption_cipher=DHE-RSA-AES256-SHA
encryption_keysize=256
etrn_domain=
Postfix version 2.5 and later:
stress=
[empty line]p@rick
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