Follow the Debian Stretch guide or Follow the Debian Jessie guide Older Debian versions are no longer supported.But if you still like to read the old versions see the archive of tutorials for Wheezy, Squeeze, Lenny, Etch, Sarge and Woody. Using a statistical algorithm incoming emails are scanned for spam. Combining the components described is no rocket science.Applies: apache 2.0.x Required apache module: – Scope: global server configuration Type: informational Description: where the default apache2 configuration files are located on various Linux distributions. you probably know this already, so not really useful…Just as a reference in case you are not familiar with a particular Linux distribution package.The command which might be helpful here is: The above command will list all packages which are no longer in a standard repository list since they were removed; thus they were rendered obsolete, or the packages were installed manually.Perform a full backup of data and manual configuration files residing on your current system.based on what package management tool you are using.
All you need is a cheap Debian server with root access on the internet and a domain. Use DKIM to sign your outgoing emails automatically. Don’t worry if you get stuck with your mail server. It is based on many years of experience and feedback.
Based on the particular Linux distribution you are using, the apache package might use different defaults on where to place its configuration file. if you don’t see the one you are using feel free to ping me to add it here.
Learn how to set up your own fully-functional mail server using Postfix, Dovecot IMAP/POP3 and My SQL backend on a Debian server just like your favorite mail or website hosting provider.
Also, a significant number of packages (over 6739, 13% of the packages in jessie) have for various reasons been removed from the distribution.
SOURCE: Given that the Debian is an extremely robust Linux distribution, combined with the fact that there is nothing certain in life, the chances are, that after the upgrade you may end up with a broken system.