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dominix
Asked: 2019-07-23 16:05:35 +0800 CST

change relayhost depending on mx for destination domain

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I am used to configure transport_maps so I can control which relay to use for specific domain.

I would like to change the relay or the route depending on the resolved MX, because a lot of domain are moving to office365 or google, so I would like to be able to select a specific relay if the domain MX is for example aspmx.l.google.com

is it possible to set this in transport_maps ?

thanks for clarification and enlightenment.

I just tried this as per this post :

smtpd_recipient_restrictions = ..., check_recipient_mx_access hash:/etc/postfix/mx_access,...

but it does not produce any relay

postfix

1 Answers

  1. Best Answer

    OK, I get to fix my own mistake, the order of smtpd_recipient_restrictions options is important, so one have to place check_recipient_mx_access in the first options, so smtpd known it has to route the message a special way BEFORE it get definitively accepted or rejected.

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