added instructions for setting up auto emails

linux/mail/msmtp.md

@@ -0,0 +1,33 @@
+# lightweight email client
+
+## install
+```
+sudo apt install msmtp-mta mailutils
+```
+
+## configure
+edit `/etc/msmtprc`:
+```
+# A system wide configuration file is optional.
+# If it exists, it usually defines a default account.
+# This allows msmtp to be used like /usr/sbin/sendmail.
+
+defaults
+# Use TLS on port 465
+port 465
+tls on
+tls_starttls off
+
+account default
+host $server
+# Envelope-from address
+from root@hostname
+# Authentication
+auth on
+user $user
+password $password
+```
+since you will be putting a plaintext password in this config file, make sure it's only readable by root:
+```
+chmod og-r /etc/msmtprc
+```

linux/zfs/send-email.md

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+# config zfs to send emails
+
+edit `/etc/zfs/zed.d/zed.rc`
+
+file is pretty self-explanatory