Orange ISP doc: english translation

This commit updates the doc to add the English translation of the Orange French
ISP page.

isp_orange.md

@@ -1 +1,85 @@
-Unfortunately, this page only exists [in french here](isp_orange_fr) for now.
+# Orange
+*Find the list of other Internet service providers **[here](/isp)**.*
+
+#### Email
+
+The Orange box has port 25 closed so as to limit the amount of spam that could be sent from a compromised home connection.
+
+The remaining solution to host one own's email at home is to route it through the Orange SMTP servers.
+
+To that end, one has to edit the postfix configuration file with the following command:
+
+```bash
+sudo nano /etc/postfix/main.cf
+```
+
+then, add the SMTP Orange server as a relay on the associated line:
+
+```bash
+relayhost = smtp.orange.fr
+```
+
+restart Postfix :
+
+```bash
+sudo service postfix restart
+```
+
+##### Problems
+
+If you are having an "Authentication required" error, the solution is as follows (note: french website): **[source](http://viruslocker.free.fr/?page_id=1749)**.
+
+Edit the postfix configuration file
+
+```bash
+sudo nano /etc/postfix/main.cf
+```
+then, add the following lines:
+
+```bash
+smtp_sasl_password_maps = hash:/etc/postfix/sasl/mdp_fai.conf
+smtp_sasl_auth_enable = yes
+smtp_sasl_security_options = noanonymous
+relayhost = [smtp.orange.fr]:25
+```
+
+Create the `mdp_fai.conf` file :
+
+```bash
+sudo nano /etc/postfix/sasl/mdp_fai.conf
+```
+
+add
+
+```bash
+# mdp_fai.conf
+[smtp.orange.fr]:25  emailaddress@at.orange:my-own-password
+```
+with your Orange account password.
+
+Integrate the password into Postfix :
+
+```bash
+sudo postmap /etc/postfix/sasl/mdp_fai.conf
+sudo postconf -e smtp_sasl_password_maps=hash:/etc/postfix/sasl/mdp_fai.conf
+```
+
+If you are having an "(SASL authentication failed; cannot authenticate to server smtp-auth.nowhere.com[38.123.22.160]: no mechanism available)" error
+
+Check that `libsasl2-modules` and `sasl2-bin` are present :
+
+```bash
+apt search libsasl2-modules
+apt search sasl2-bin
+```
+
+If they are not present, do install them :
+
+```bash
+apt install libsasl2-modules sasl2-bin
+```
+
+It is possible that postfix does not immediately take into account your modifications. To force it to do so, run
+```bash
+systemctl restart postfix
+```

isp_orange_fr.md

@@ -66,7 +66,7 @@ sudo postconf -e smtp_sasl_password_maps=hash:/etc/postfix/sasl/mdp_fai.conf
 
 Si vous avez une erreur "(SASL authentication failed; cannot authenticate to server smtp-auth.nowhere.com[38.123.22.160]: no mechanism available)"
 
-Vérifier la présence de libsasl2-modules et de sasl2-bin :
+Vérifier la présence de `libsasl2-modules` et de `sasl2-bin` :
 
 ```bash
 apt search libsasl2-modules