I think you should try to set in /etc/postfix/main.cf :
myhostname = your_machine.your_domain
mydomain = your_domain
...
relayhost = [@IP Exchange]
In your file /etc/postfix/transport put:
your_domain smtp:[@IP Exchange]
Then do :
postmap /etc/postfix/transport
/etc/init.d/postfix reload...
I'm using a pipe service which calls a shell but I don't want postfix to send a DSN if the shell does not exist.
If anybody knows how to do that, it would be great.
Thanks in advance.
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