How postfix handles non-deliverable messages?

Posted on 2012-08-20
Last Modified: 2012-08-27
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.

Question by:virgo0880
    LVL 19

    Accepted Solution


    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
    # postsuper -r ALL

    Author Comment

    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

    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.

    LVL 19

    Expert Comment

    There is no delayed notification.

    Author Comment

    Actually i got the options for delayed notification.


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

    Thanks for all your help. Giving points

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