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-What is Postfix? It is Wietse Venema's mailer that started life as an
-alternative to the widely-used Sendmail program.
-
-Postfix attempts to be fast, easy to administer, and secure, while at
-the same time, being sendmail compatible enough to not upset existing
-users. Thus, the outside has a sendmail-ish flavor, but the inside is
-completely different.
-
-This script builds postfix with support for Dovecot SASL but does not
-include any support for Cyrus-SASL. If you need to enable support for
-Cyrus see SASL_README in the source code. You can also enable support
-for MySQL and Postgres. This script should find support for BerkleyDB
-and PCRE automagically, so no special options are required. Further,
-this script builds postfix with TLS support and requires that openssl
-be installed. openssl-solibs is not enough. You can find a SlackBuild
-script for Dovecot at http://www.SlackBuilds.org/ but you do not need
-to install it to use this package without SASL.
-
-A couple things to remember about postfix:
- - this script doesn't add the necessary postfix user and postdrop
- group, but exits if they do not exist. Add these before running
- this script. They should have no special permission and postfix
- should NOT be a member of the postdrop group. The script *WILL*
- offer some sane defaults that won't conflict with the canonical
- users and groups, and shouldn't conflict with any other scripts
- downloaded from SlackBuilds.org that require their own uids and
- gids
- - many of the utilities in postfix have multiple manpages such as
- postconf(5) and postconf(8). Use man -k to find them.
- - subscribe to the postfix-users mailing list
-
-If you have any questions or comments about this script, you are free
-to contact me via e-mail at <alan@lizella.net>. Thanks!
+Postfix is Wietse Venema's mailer that started life as an alternative to the
+widely-used Sendmail program. It attempts to be fast, easy to administer, and
+secure, while at the same time, being sendmail compatible enough to not upset
+existing users. Thus, the outside has a sendmail-ish flavor, but the inside is
+completely different.
+
+This script builds postfix with optional support for Dovecot SASL, Cyrus SASL
+can be enabled with:
+
+ SASL=cyrus ./postfix.SlackBuild
+
+You can also enable support for MySQL:
+
+ DATABASE=mysql ./postfix.SlackBuild
+
+This script will find support for BerkleyDB and PCRE automagically; TLS support
+requires openssl package, openssl-solibs alone is not enough. Additionally, this
+script doesn't add postfix user and groups, instead it offers sane defaults that
+won't conflict with system users and groups, and other scripts from the SBo.
+
+Package created with this script will conflict with stock sendmail package, you
+*should* remove sendmail before installing postfix, otherwise sendmail updates
+could break your postfix instance.
+
+When upgrading from an older postfix version, make sure the variables such as
+html_directory and readme_directory in /etc/postfix/main.cf point to the new
+location. These can also be fixed later, afterwards make sure to run:
+
+ postfix set-permissions
+
+Furthermore, many of the utilities in postfix have multiple manpages such as
+postconf(5) and postconf(8). Use man -k to find them, and don't forget to
+subscribe to the postfix-users mailing list!