Re: etc/postfix/sender_access_map and /etc/aliases

[Noel Jones]

Dave Johnson wrote:
sender_access_map
Stops the server receiving mail when installed via postfix reload


No doubt postfix logs a helpful message telling what the 
problem is.
http://www.postfix.org/DEBUG_README.html#logging

warning: restriction `check_client_access' after `permit' is ignored


That's just a warning that your map is ignored.  It won't stop 
postfix from receiving mail.

And the warning is about a client access map, not the sender 
access map your question was about.

  -- Noel Jones