Postfix 'access denied' error

[Greg Woods]

On Wed, 2009-11-18 at 18:45 +0100, Luc MAIGNAN wrote:
> Hi,
> 
> I have setup a postfix server under a F11-x64.
> All seem to be good, but when a user send a mail using 'Lotus Notes' 
> postfix says '554 5.7.1 client host rejected : access denied'

Sounds like you need to set your "mynetworks" parameter properly to
allow your clients to relay through your server. 

http://www.postfix.org/BASIC_CONFIGURATION_README.html#relay_from

--Greg