add sources

Author: binarypatrick

_posts/bitwarden-automated-backup.md

@@ -65,4 +65,8 @@ PATH=/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin
 ```bash
 OUTNAME=$(basename $1 .enc).json
 openssl enc -aes-256-cbc -pbkdf2 -iter 1000000 -d -nopad -in $1 -out $OUTNAME
-```
+```
+
+## Resources
+- https://www.digitalocean.com/community/tutorials/send-email-linux-command-line
+- https://easyengine.io/tutorials/linux/ubuntu-postfix-gmail-smtp/