Thank you. That clarifies it for me. I will look at those links. Durwin
From: Noel Jones <njo...@megan.vbhcs.org> To: postfix-users@postfix.org Date: 06/27/2018 02:01 PM Subject: Re: Need to understand mynetworks_style more Sent by: owner-postfix-us...@postfix.org On 6/27/2018 2:44 PM, dur...@mgtsciences.com wrote: > In our live system, I have firewall forwarding port 25 to mail > server. That mail server then delivers mail to Domino server. > > I am testing on a VM, and I have this much configured and working > within our LAN. > > I am unclear as to delivery restrictions. The default for > mynetworks_style is subnet, so email will be accepted from any > machine on LAN. > Does this restrict email coming in from internet? Since I can't > test with live system, I can't forward port 25 to VM for testing. > > My goal: > I am migrating from Sendmail. In Sendmail I use virtusertable to > pass only defined users on to Domino server. > The problem I am having with Sendmail is, it does not reject email > to unknown users, even with > @mydomain.com ERROR > at end of file. I am hoping Postfix can do this. So I need to know > how to receive email from internet > and reject unknown users, preferable before initial handshaking is > complete and the whole emaill has been > transferred. > > Thank you The mynetworks and mynetworks_style settings are for which machines will be able to relay mail. Any machine should be able to send mail to relay_domains, which is where your internal server should be listed. Typically, you would set mynetworks manually to specify the allowed hosts/subnets and mynetworks_style won't be used. Assuming your internal domain is listed in relay_domains, valid users are listed in relay_recipient_maps, or postfix can use reject_unverified_recipient to build a list automatically with address probes. A minimal config example can be found here: http://www.postfix.org/STANDARD_CONFIGURATION_README.html#firewall Some other pertinent pages: http://www.postfix.org/ADDRESS_CLASS_README.html http://www.postfix.org/ADDRESS_VERIFICATION_README.html -- Noel Jones This email message and any attachments are for the sole use of the intended recipient(s) and may contain proprietary and/or confidential information which may be privileged or otherwise protected from disclosure. Any unauthorized review, use, disclosure or distribution is prohibited. If you are not the intended recipient(s), please contact the sender by reply email and destroy the original message and any copies of the message as well as any attachments to the original message.
