OpenSMTPD is a FREE implementation of the server-side SMTP protocol
as defined by RFC 5321, with some additional standard extensions.
It allows ordinary machines to exchange e-mails with other systems
speaking the SMTP protocol.
This package conflicts with the stock postfix (or sendmail) package
included in Slackware and overwrites some of its files,
so remove the postfix (or sendmail) package before installing opensmtpd
You must have smtpd and smtpq users and groups on the system for
privilege separation - something like this should suffice:
groupadd -g 270 smtpd
useradd -u 270 -g 270 -r -s /bin/false -d /var/empty smtpd
groupadd -g 271 smtpq
useradd -u 271 -g 271 -r -s /bin/false -d /var/empty smtpq
You will want to modify rc.local so that OpenSMTPD
will start on boot something like this:
# start opensmtpd a replacement for sendmail and postfix
if [ -x /etc/rc.d/rc.opensmtpd ]; then
. /etc/rc.d/rc.opensmtpd start
fi
Optional Dependency: LibreSSL
To use the LibreSSL runtime libraries
First install LibreSSL
then build OpenSMTPD
For hints on using alpine with OpenSMTPD see the README.alpine file
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