Hi, I took a quick look, I did not see which version of Postfix this was based on, you may want to mention it as some settings require a minimum Postfix version to be running. As well as some command examples you gave have minimum versions needed to work.
I am no expert but I get lots of legit email from servers with no RDNS so this may be too strong a setting ?? smtpd_client_restrictions = permit_mynetworks permit_sasl_authenticated reject_unknown_reverse_client_hostname The purpose of this section seems to be a bad idea ? Removing Telltale Headers How do you troubleshoot delivery or other problems without logs to show what postfix decided to do about an email ? Finally you mention "Nextcloud" I did not google it so I do not know what it is, if you are talking about Postfix you should stick to generic topics without specifying specific brands of products so a larger audience knows what you are talking about. IMHO. For example your user repository could be a Directory, database, or files. It may not help to mention specific products that implement those repositories ? Thank you. -ANGELO FAZZINA ITS Service Manager: Spam and Virus Prevention Mass Mailing G Suite/Gmail ang...@uconn.edu University of Connecticut, ITS, SSG, Server Systems 860-486-9075 -----Original Message----- From: owner-postfix-us...@postfix.org <owner-postfix-us...@postfix.org> On Behalf Of da-postfixusers...@abelonline.de Sent: Friday, June 15, 2018 7:52 PM To: Postfix users <postfix-users@postfix.org> Subject: Feedback on Tutorial Hello Postfix users, I made a relatively comprehensive tutorial[1] on how to set up a mail server (Postfix, Dovecot, Rspamd,..) and integrate it with Nextcloud. My goal was to create a all-in-one, step-by-step tutorial from beginning to end. I partly used other tutorials as a basis, but also did a lot of research and e.g. used much stricter smtpd_*_restrictions than I have seen anywhere else. It's a hobby project, I am not a full-time mail admin, so probably not useful for large companies. I would greatly appreciate your feedback and hints on possible errors or oversights. A direct link to the Postfix section: https://na01.safelinks.protection.outlook.com/?url=https%3A%2F%2F123qwe.com%2Ftutorial%2F%23postfix&data=02%7C01%7Cangelo.fazzina%40uconn.edu%7C213ae3bd20fb4b79bb4c08d5d31b3189%7C17f1a87e2a254eaab9df9d439034b080%7C0%7C1%7C636647036128899329&sdata=PfVxAft0NrOjsxCaTUhqmw3Y9cB3Nm2GXCmN%2BE0Hv4s%3D&reserved=0 Thank You Alexey [1] https://na01.safelinks.protection.outlook.com/?url=http%3A%2F%2F123qwe.com&data=02%7C01%7Cangelo.fazzina%40uconn.edu%7C213ae3bd20fb4b79bb4c08d5d31b3189%7C17f1a87e2a254eaab9df9d439034b080%7C0%7C1%7C636647036128899329&sdata=XLi2ndZ3kDr9qP9uwDmyixzKmFdMuEK7%2F5RvUrAzb1E%3D&reserved=0
