Setup:
- Nextcloud 14.0.3
- CentOS 7.x
- Apache/httpd
- Postfix
When configuring NC14.0.3 with sendmail (php-mailer no longer works) you will face a situation where sendmail cannot access smtpd and postdrop. There seems not to be a default ruleset in centOS for this. Therefore you have to define your own selinux modules.
The documentation in https://docs.nextcloud.com/server/14/admin_manual/installation/selinux_configuration.html does not reflect this.
It would be awesome, if someone can have a look.
Feel free to reach out to me, if you need some support here.