I try to configure OpenProject to send invitation and notifications mails over smtp. Therfore I configured the setings under Administration -> System Setings -> Email notification -> Configure your email provider with the settings of an smtp email accont I also use to send from other linux applications without any problems.
If I try to send a test mail I get this error message: "An error occurred while sending mail (end of file reached)"
If I fill in an invalid mail-server address I get an other error message: "An error occurred while sending mail (getaddrinfo: Name or service not known)"
So this configuration set there seems to be used by the mail process.
I already looked for similar articles in this forum and aolso googled a lot but I still wonder what is the difference between the mail configuration mentioned above (Administration -> System Setings -> Email notification -> Configure your email provider) and the settings in the configuration file /opt/bitnami/apps/openproject/htdocs/config/configuration.yml mentioned in some articles.
How are these methods related?
Do I have to configure outgoing mails in the OpenProject web frontend or in the yml-file?
Where can I find the logs of the mail sending process to get detailed error informations?
Im using this VM: bitnami-openproject-7.4.7-1-linux-debian-9-x86_64.ova