Installing NextCloud Hub with OnlyOffice on Ubuntu 18.04
I have previously provided an in-depth explanation about NextCloud with Collabora Office Online and how we've installed it on Ubuntu 16.04. This is an update both of the process, and of the technology.
Configuring a Linux server to send email via the Postfix SMTP server using an external authenticating SMTP host
Just about any and every server needs to be able to send email - whether it's end-user-email, like password recovery services for a website to emails to system administrators reporting on the status of system backups and errors. The problem is that it's non trivial (understatement) to set up a mail server properly.