On 12/30/2014 09:35 PM, Jonathan Hermann wrote: > Ok, then it's by design. So spamassassin/amavis will have to do. > > Thanks everybody for your time and input. Really appreciate it! > > Regards > Nathan > > > Am 28.12.2014 um 21:50 schrieb Wietse Venema: >> Jonathan Hermann: >>> I can send mail from an external source (e.g. mail client on my >>> notebook) to a local user (local on my mailserver) without >>> authentication. I'm not sure, is this by design? >> By default, *any* system can send mail to a local address. Postfix >> normally requires client authentication only when a client wants >> to send mail to a remote address. >> >> Wietse >
If you don't want to receive any mail from other mail servers to your postfix, you could blacklist all ips with postscreen http://www.postfix.org/postscreen.8.html and make your authenticated connections to port 587 with Thunderbird or whatever clients you choose. Not certain if that's what you're looking for but I get the impression you do not expect incoming mail to Postfix. -Thom
