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How postfix handles non-deliverable messages?

Hi All,

I want to know how postfix handles non-deliverable messages. Is there any setting in postfix which says after how many days we should get the message saying my email was not delivered. Before that, how many times it tries to deliver that message and where are all these settings kept in postfix configuration. Whether it can be changed? whether it needs restart of postfix services? This is bit urgent.

Thanks
virgo
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virgo0880
Asked:
virgo0880
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1 Solution
 
bevhostCommented:
See
http://www.postfix.org/postconf.5.html#bounce_queue_lifetime
http://www.postfix.org/TUNING_README.html#hammer

I think you should find what you are looking for above.

Normally these changes would require a postfix reload.
Also, if you want to get things moving right away, you can requeue all the mail
eg
# postsuper -r ALL
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virgo0880Author Commented:
Thanks bevhost for that links. But,

I was trying to compare these settings to our Exchange Server settings. On Exchange server, there are two options which says this:

Message expiration
Maximum time since submission (days):              2

Notifications
Notify sender when message is delayed more than (hours):       4

Now, on our linux smtp servers the parameters bounce_queue_lifetime is not defined, so I am considering it as 5days. We will get the NDR receipt after 5 days. But is there any notification parameter in postfix just like Exchange Notification option.

Actually, we want to have standard figures in both exchange and postfix environment.

Thanks
virgo
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bevhostCommented:
There is no delayed notification.
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virgo0880Author Commented:
Actually i got the options for delayed notification.

delay_warning_time

and i have tuned it to match my exchange Server configurations.

Thanks for all your help. Giving points
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