Re: Error with Dovecot LDA when recipient address is incomplete
On 23/6/2011 6:11 μμ, Victor Duchovni wrote:
However, if none of the above is useful, you can I believe use:
-d ${user:no-such-user}
this may not be documented in the pipe(8) manual page, if sothink this
is a rare documentation oversight. Almost universally, undocumented
Postfix behaviour is not a hidden feature, but rather an implementation
artifact, that is subject to change.
Thanks Victor,
For the time being, I have added:
reject_unknown_recipient_domain, reject_unverified_recipient
to smtpd_recipient_restrictions and I'll see how it goes. My first tests
are successful, but I might try your suggestion too.
What does
${user:no-such-user}
exactly do?
Nick
smime.p7s
Description: S/MIME Cryptographic Signature
Re: Error with Dovecot LDA when recipient address is incomplete
On Fri, Jun 24, 2011 at 01:00:37PM +0300, Nikolaos Milas wrote:
What does
${user:no-such-user}
exactly do?
If ${user} is the empty string, the value no-such-user is used
instead. Presumably that is not a valid IMAP user in your environment,
so the mail will bounce.
--
Viktor.
Re: Error with Dovecot LDA when recipient address is incomplete
On 06/23/2011 02:26 PM, Nikolaos Milas wrote:
Hi,
We are using Postfix 2.8.3 with Dovecot 2.0.13 on CentOS 5.6.
The problem we have is that sometimes, due to mail sender's error when
composing a message, the sender attempts to send an email to @noa.gr
(without specifying the user part of the address). This results in a
Postfix error due to Dovecot LDA use:
Jun 22 21:05:31 vmail postfix/pipe[31862]: CC89FC4D210: to=@noa.gr,
relay=dovecot, delay=0.41, delays=0.24/0.013/0/0.15, dsn=5.3.0,
status=bounced (command line usage error. Command output:
/usr/libexec/dovecot/dovecot-lda: option requires an argument -- d
Usage: dovecot-lda [-c config file] [-a address] [-d username]
[-p path][-f envelope sender] [-m mailbox]
[-e] [-k] )
Postfix master.cf is configured as:
dovecot unix - n n - - pipe
flags=DRhu user=vmail:vmail argv=/usr/libexec/dovecot/dovecot-lda
-f ${sender} -d ${user}
Obviously this happens because in this case there is no ${user} data.
Can we somehow configure Postfix to directly bounce such mails
(missing the user part of the address) without attempting to forward
them to Dovecot LDA?
Thanks,
Nick
Wont adding :
reject_unknown_recipient_domain, reject_unverified_recipient
to smtpd_recipient_restrictions solve this issue ?
Mihira.
Re: Error with Dovecot LDA when recipient address is incomplete
On Thu, Jun 23, 2011 at 11:56:22AM +0300, Nikolaos Milas wrote:
dovecot unix - n n - - pipe
flags=DRhu user=vmail:vmail argv=/usr/libexec/dovecot/dovecot-lda -f
${sender} -d ${user}
Obviously this happens because in this case there is no ${user} data.
It is not clear how the message entered your queue, recipient validation
in the SMTP server should be able to reject such mail. The transport
mapping to dovecot could also be per-user or implemented for a
synthetic domain to which valid user addresses are rewritten.
However, if none of the above is useful, you can I believe use:
-d ${user:no-such-user}
this may not be documented in the pipe(8) manual page, if sothink this
is a rare documentation oversight. Almost universally, undocumented
Postfix behaviour is not a hidden feature, but rather an implementation
artifact, that is subject to change.
--
Viktor.
Re: Error with Dovecot LDA when recipient address is incomplete
Mihira Fernando:
dovecot unix - n n - - pipe
flags=DRhu user=vmail:vmail argv=/usr/libexec/dovecot/dovecot-lda
-f ${sender} -d ${user}
Obviously this happens because in this case there is no ${user} data.
That is incorrect. There is always one argument that follows the -d option,
even when that argument is a zero-length string.
So, it would appear that something is messing up the argument vector.
Besides, Postfix does not accept mail for the zero-length address.
Perhaps you have some aliasing rule in place that produces null
string results.
Wietse
