diff --git a/troubleshooting/send_mail.md b/troubleshooting/send_mail.md
index d57b8d83a97387e19a3a24ad1d949d67b5300b0f..9b433e0e299e9143d686edec4b0098ba6a10b0c3 100644
--- a/troubleshooting/send_mail.md
+++ b/troubleshooting/send_mail.md
@@ -1,8 +1,65 @@
-Envoi de mails
-==========================
+# Envoi de mails
 
 ## Vérifications
 
-*sendmail/batch/config/config.xml
 
-*notifications/batch/config/config.xml
\ No newline at end of file
+```bash
+maarch@MaarchIntegration1810:/var/www/html/MaarchCourrier/custom/cs_test/modules/notifications/batch/config$ ls -ltr
+total 4
+-rwxrwx--- 1 maarch maarch 2824 juil. 11 17:41 config.xml
+```
+
+```sh
+maarch@MaarchIntegration1810:/var/www/html/MaarchCourrier/custom/cs_test/modules/sendmail/batch/config/config.xml$ ls -ltr
+total 4
+-rwxrwx--- 1 maarch maarch 2824 juil. 11 17:41 config.xml
+```
+
+https://docs.maarch.org/gitbook/html/MaarchCourrier/18.04/guat/guat_exploitation/sendmail_notif.html
+
+## Diagnostique
+
+Dans le cas de non reception de mail, on peut faire le test en lançant le script d'envoi de mail :
+
+```
+/var/www/html/MaarchCourrier/custom/cs_carrieres/modules/notifications/batch/scripts$ ./sendmail.sh
+```
+
+Puis vérifier la log :
+
+```shell
+maarch@MaarchIntegration1810:/var/www/html/MaarchCourrier/modules/notifications/batch$ ls -ltr
+total 136
+drwxrwx--- 6 maarch www-data  4096 mai   27 15:53 logs
+```
+
+```
+maarch@MaarchIntegration1810:/var/www/html/MaarchCourrier/modules/notifications/batch/logs/process_email_stack$ ls -ltr
+total 4
+-rw-r--r-- 1 maarch www-data 484 août   6 10:56 2019-08-06_10-55-26.log
+```
+
+```
+maarch@MaarchIntegration1810:/var/www/html/MaarchCourrier/modules/notifications/batch/logs/process_email_stack$ tail -f 2019-08-06_10-55-26.log
+[2019-08-06 10:55:26] INFO 0 'Load xml config file:/var/www/html/MaarchCourrier/custom/cs_carrieres/modules/notifications/batch/config/config.xml'
+[2019-08-06 10:55:26] INFO 0 'Load xml config file:/var/www/html/MaarchCourrier/custom/cs_carrieres/modules/notifications/batch/config/config.xml'
+[2019-08-06 10:55:26] INFO 0 'An instance of the batch is already in progress. Waiting for the second try..'
+[2019-08-06 10:56:26] INFO 109 'An instance of the batch is already in progress'
+```
+
+Le message 'An instance of the batch is already in progress' peut signifier qu'il y a des fichiers .lck qui bloquent l'execution du script :
+
+```
+maarch@MaarchIntegration1810:/var/www/html/MaarchCourrier/modules/notifications/batch$ ls -ltr
+total 136
+drwxrwx--- 6 maarch www-data  4096 mai   27 15:53 logs
+-rw-r--r-- 1 maarch www-data     1 mai   28 10:15 process_event_stack_error.lck
+-rw-r--r-- 1 maarch www-data     1 mai   28 10:30 process_email_stack.lck
+```
+
+Supprimer les .lck puis relancer le script
+
+```
+maarch@MaarchIntegration1810:/var/www/html/MaarchCourrier/modules/notifications/batch$ rm *.lck
+```
+