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--- tutorial:mail:postfixredir [2016-04-03 23:00] – [Step 3] weichbr
+++ tutorial:mail:postfixredir [2025-06-16 14:41] (current) – removed weichbr
@@ Line 1: / Line 1: @@
-{{tag>tutorial mail}}
-====== Configure postfix as a backup for Exchange ======
-===== Problem =====
-  * I want to use postfix on a virtual server as a backup in case my Exchange is down. Postfix should accept every mail and deliver it to the Exchange server instantly or wait until the Exchange server is available.
-===== Requirements =====
-  * Existing postfix installation
-  * Existing Exchange installation
-----
-===== Step 1 =====
-  * Login to your virtual server via ssh.
-----
-===== Step 2 =====
-  * Create and open the file /etc/postfix/transport
-  * Insert ''%%domain.com smtp:exchangehost.name%%'' for every domain you want to relay on its own line.
-  * Run ''%%postmap /etc/postfix/transport%%''
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-===== Step 3 =====
-  * Edit ''%%/etc/postfix/main.cf%%''
-  * Insert ''%%relay_domains = domain.com%%''. If you want multiple domains, separate them with a space.
-  * Insert ''%%transport_maps = hash:/etc/postfix/transport%%''
-  * Run ''%%/etc/init.d/postfix reload%%''