diff --git a/data/git.md b/data/git.md
index 37c02f6..a5f3062 100644
--- a/data/git.md
+++ b/data/git.md
@@ -6,7 +6,7 @@ tags: [ "Documentation", "data" ]
 
 ## New Machines
 
-> git config --global user.email *"malinfreeborn@tutamail.com"*
+> git config --global user.email *"malinfreeborn@posteo.net"*
 
 > git config --global user.name *"Malin Freeborn"* 
 
diff --git a/data/gpg-ssh.md b/data/gpg-ssh.md
new file mode 100644
index 0000000..f1acedf
--- /dev/null
+++ b/data/gpg-ssh.md
@@ -0,0 +1,49 @@
+<!--
+Source:
+https://ryanlue.com/posts/2017-06-29-gpg-for-ssh-auth
+-->
+
+Install `gnupg`.
+
+Generate a new gpg key just for authentication:
+
+> gpg2 --expert --edit-key 024C6B1C84449BD1CB4DF7A152295D2377F4D70F
+
+Toggle options `S`, `E`, and `A` until the following output:
+
+```
+Current allowed actions: Authenticate
+```
+
+Add ssh to the gpg key agent.
+
+> echo enable-ssh-support >> ~/.gnupg/gpg-agent.conf
+
+This won't take effect until you restart the gpg agent, so kill it:
+
+> gpgconf --kill gpg-agent
+
+> gpgconf --launch gpg-agent
+
+Use 2048 (or whatever) bits, save, and exit.
+
+Add this to your `~/.bash_profile`:
+
+```
+export SSH_AUTH_SOCK=$(gpgconf --list-dirs agent-ssh-socket)
+```
+
+> source ~/.bash_profile
+
+Find the ssh key's keygrip with:
+
+> gpg -k --with-keygrip
+
+It's the one with `[A]` next to it.
+Add it to `~/.gnupg/sshcontrol`.
+
+> echo 1P0P6SA7S07Q8198414P126OR0514R3R8Q1389SP > ~/.gnupg/sshcontrol
+
+Confirm it's added:
+
+> ssh-add -l
diff --git a/data/gpg.md b/data/gpg.md
index 08ec6ec..c8b4b58 100644
--- a/data/gpg.md
+++ b/data/gpg.md
@@ -12,7 +12,7 @@ Follow the guide.
 
 # Encrypting a file
 
-> gpg -r malinfreeborn@tutamail.com -e file
+> gpg -r malinfreeborn@posteo.net -e file
 
 `-r` specifies the recipient.