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postfix inbound relay

Relaying Mail and MX backup

First make sure the server is not an open relay, it would allow anyone sending mail through the server.

The “reject_unauth_destination” is the vital part.

The following tells postfix what mail to relay and where.

In the “transport” file set up each domain and where it should be relayed. This file is also used for the “relay_domains” parameter that will only read the first column.

List all recipients that should be relayed in the “relay_recipients” file. Easiest is to simply list a domain and accept all addresses for it.

By instead specifying each real address the mail relay server can discard mail to non existing users directly. Then the list will however need to be updated when you add/remove addresses/mailboxes on your mail server.

Some other good settings include the maximum message size that I set to 25 MB, same as Gmail. The queue lifetime decides how long the server will keep trying to send mail. I set this to 10 days, this gives ample time to get a mail server up and running again.

See Postfix Configuration Parameters for a detailed explanation of all the parameters.

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Truva Linux takımıyla 2006'da tanışan "Çaylak Penguen" -BASH- betiklerine bayılır. Truva'nıñ çekirdek derleme işleri ile çalışan cd tasarımıyla uğraşmaktadır.

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