Sharma, Ashish:
> Hi,
>
> I have a postfix(postfix 2.6.5) mail receiving server.
>
> On this I have used an email filter (sendmail-jilter
> http://sendmail-jilter.sourceforge.net/) that have some of my custom code.
> Following setting is used for the milter in 'main.cf':
>
> #Milter support for smtpd mail
> smtpd_milters =
> inet:localhost:10028
>
> milter_protocol = 2
>
> Here on email loads of approx 40/hour the setup is fine but for email loads
> of approx 600/hour, I am facing following messages in postfix logs:
>
> Aug 9 07:34:12 ip-10-244-155-191 postfix/cleanup[10308]: warning: milter
> inet:localhost:10028: can't read SMFIC_EOH reply packet header: Success
> Aug 9 07:34:12 ip-10-244-155-191 postfix/cleanup[10308]: 771CB100168:
> milter-reject: END-OF-MESSAGE from xxx.atlanta.xx.com[15.xxx.32.xx]: 5.5.0
> Service unavailable; from=<xxxx.x...@**.com>
> to=<[email protected]> proto=ESMTP helo=<xxx.atlanta.xx.com>
Have you configured "milter_default_action = reject"? Don't do that
if you want mail to be tried again latrer.
Unfortunately, Milter applications can fail under high load - they
run inside one multi-threaded process, while Postfix runs one smtpd
process and one cleanup process per SMTP session.
Wietse
