From: Anant S Athavale (anantisac.gov.in)
Date: Fri May 02 2008 - 01:33:42 CDT

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Dear ALL:

To make the things clear, please note the following:

Whenever REJECT happens, it logs the helo hostname in the logs. But,
when the sender is informed of this and he corrects the problem, we
start receiving the mails. But, I want to log the new helo hostname
which he would have set to solve the problem. How do I achieve it.
This is not be a permanent requirement.

Regards,
ANANT.

Quoting MrC <lists-postfixcappella.us>:

> Anant S Athavale wrote:
>> Dear D Hill,
>>
>> I want to know, how to log the entry of introducing host in the
logs
>> when it is correct and resolvable. (ie. mail does not get
rejected,
>> during that time).
>>
>> Regards,
>> ANANT.
>>
>>
>
> I'm not clear if you want to do this for a specific host, set of
> hosts, or all. Regardless, you could create a WARN action in a
helo
> access check:
>
> main.cf:
> smtpd_recipient_restrictions =
> ...
> permit_mynetworks
> reject_unauth_destination
> check_helo_access pcre:/etc/postfix/helo_checks.pcre
> ...
>
> /etc/postfix/helo_checks.pcre:
> ...
> /./ WARN sample helo WARN log entry
>
> This will generate WARN log entries such as :
>
> May 1 22:57:36 glacier postfix/smtpd[18974]: NOQUEUE: warn: RCPT
> from example.com[10.0.0.1]: sample helo warn log entry;
> from=<meexample.com> to=<meexample.com> proto=ESMTP
> helo=<example.net>
>
> Perhaps not a good long term solution, but gives you the data you
seek.
>
> MrC
>
>
>>
>> Quoting D Hill :
>>
>>> On Fri, 2 May 2008 at 10:38 +0530, anant at isac.gov.in
confabulated:
>>>
>>>> Dear List:Following is one line from the postfix logs.
>>
---------------------------------------------------------------------------------
May 2 10:05:44 dnserns.isac.gov.in: postfix/smtpd[1536248]:
>> NOQUEUE:
>> reject: RCPT from unknown[72.3.227.162]: 502 5.7.1 : Helo command
>> rejected: Host not found; from= to= proto=SMTP helo=
>>
------------------------------------------------------------------------------As
per the above example, as we have used the policy
>> of
>> reject_unknown_hostname and the mails where introducing host is
not
>> resolvable are getting rejected.Now, when the users complain that,
>> some mails are not getting delivered to them, we go through logs
and
>> find the reason like one above and inform that this is due to this
>> and tell the sender also to look into their configuration and
resolve
>> the issue. And most of the times, they solve the issue.But, when
they
>> solve, I want to know what their system is now introducing itself
as.
>> How can I make it part of log? Can it also
>>>> b
>>> ecome part of Mail headers?Regards, ANANT.
>>>
>>> Disreguard my previous response. I didn't quite know what the
helo
>>> log lines contained. You should be looking for lines that have
the
>>> content:
>>>
>>> Helo command rejected
>

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