diff --git a/docs/README.md b/docs/README.md
index 91d96a66..ce3c3d50 100644
--- a/docs/README.md
+++ b/docs/README.md
@@ -3,4 +3,5 @@
 - [How to configure remark42 with nginx reverse proxy](nginx-proxy.md)
 - [How to configure remark42 without a subdomain](subdomain.md)
 - [Telegram notifications](telegram.md)
+- [Setup email authentication](email.md)
  
diff --git a/docs/email.md b/docs/email.md
new file mode 100644
index 00000000..99b554dc
--- /dev/null
+++ b/docs/email.md
@@ -0,0 +1,46 @@
+## Setup email authentication
+
+To allow email auth `AUTH_EMAIL_ENABLE` should be set to `true`. In addition, user needs to configure SMTP details with
+
+```
+AUTH_EMAIL_HOST         
+AUTH_EMAIL_PORT         
+AUTH_EMAIL_FROM         
+AUTH_EMAIL_SUBJ         
+AUTH_EMAIL_CONTENT_TYPE 
+AUTH_EMAIL_TLS          
+AUTH_EMAIL_USER         
+AUTH_EMAIL_PASSWD       
+AUTH_EMAIL_TIMEOUT      
+AUTH_EMAIL_TEMPLATE
+```
+
+This is an example of configuration using mailgun email service:
+
+```
+      - AUTH_EMAIL_ENABLE=true
+      - AUTH_EMAIL_HOST=smtp.mailgun.org
+      - AUTH_EMAIL_PORT=465
+      - AUTH_EMAIL_TLS=true
+      - AUTH_EMAIL_USER=postmaster@mg.remark42.com
+      - AUTH_EMAIL_PASSWD=*********
+      - AUTH_EMAIL_FROM=confirmation@remark42.com
+```
+
+For gmail:
+
+```
+      - AUTH_EMAIL_ENABLE=true
+      - AUTH_EMAIL_HOST=smtp.gmail.com
+      - AUTH_EMAIL_PORT=465
+      - AUTH_EMAIL_FROM=example.user@gmail.com
+      - AUTH_EMAIL_SUBJ=Comments email confirmation
+      - AUTH_EMAIL_TLS=true
+      - AUTH_EMAIL_USER=example.user@gmail.com
+      - AUTH_EMAIL_PASSWD=secretpassword
+```
+
+Usually you don't need to change/set anything else. In case if you want to use a different email template set `AUTH_EMAIL_TEMPLATE`, for instance
+`- AUTH_EMAIL_TEMPLATE="Confirmation email, token: {{.Token}}"`. See [verified-authentication](https://github.com/go-pkgz/auth#verified-authentication) for more details.
+
+ 
\ No newline at end of file