Am 07.02.2014 16:26, schrieb LuKreme: > On 07 Feb 2014, at 01:12 , Stefan Michael Guenther <s.guent...@in-put.de> > wrote: > >> The problem is, that our client wants to send emails with the sender domains >> of his clients from his own postfix server. > > There is no legitimate reason to do this. In fact, my servers (and I suspect > many servers) block all email from > outside that claims to be from our domains
*there is a GOOD reason* software running on that server directly talking SMTP and not handling connection problems proper which it does not need to, in all that cases you have a local postfix and your application talks to 127.0.0.1 *but* that does not mean you have to deliver the messages directly to the final destination, better said: you should never do so if you are not the responsible server of the sender domain that's why the features below exists to queue messages local and send them out with the smtp server responsible for the sending domain and having proper SPF records that's what i expect from our customers and on the other how i handle any sender which my server is not destination for smtp_sasl_auth_enable = yes smtp_sender_dependent_authentication = yes smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd sender_dependent_relayhost_maps = hash:/etc/postfix/sasl_relay_maps
