diff --git a/duplicati/monitor.backup.sh b/duplicati/monitor.backup.sh
index 6823fbc..28f025d 100755
--- a/duplicati/monitor.backup.sh
+++ b/duplicati/monitor.backup.sh
@@ -54,7 +54,8 @@ readonly MIN_SIZE_INT_DEFAULT="10"
 readonly MIN_SIZE_UNIT_DEFAULT="MB"
 readonly MIN_SIZE_DEFAULT="${MIN_SIZE_INT_DEFAULT}${MIN_SIZE_UNIT_DEFAULT}"
 ## Default domain for email addresses
-readonly USER_EMAIL_DOMAIN_DEFAULT=$(hostname -d)
+USER_EMAIL_DOMAIN_DEFAULT=$(hostname -d) ; readonly USER_EMAIL_DOMAIN_DEFAULT
+SENDER_EMAIL_ADDRESS_DEFAULT="duplicati@$(hostname --fqdn --)" ; readonly SENDER_EMAIL_ADDRESS_DEFAULT
 
 ## Colors
 readonly PURPLE='\033[1;35m'
@@ -78,6 +79,12 @@ EXAMPLES :
     - Apply to a specific directory (/mnt/remote.duplicati)
         ${PROGNAME} --dir /mnt/remote.duplicati
 
+    - Use a specific email address for sender
+        ${PROGNAME} --sender "admin@domain.tld"
+
+    - Use a specific email address and name for sender
+        ${PROGNAME} --sender "Duplicati no-reply <admin@domain.tld>"
+
 OPTIONS :
     -d,--dir,--directory
         Path where users home directory are stored
@@ -91,6 +98,10 @@ OPTIONS :
         Domain used to build user's email address.
         (default: ${USER_EMAIL_DOMAIN_DEFAULT}).
 
+    --sender,--mail-sender,--sender-mail
+        Email address used to send mails to users.
+        (default: ${SENDER_EMAIL_ADDRESS_DEFAULT}).
+
     --debug
         Enable debug messages.
 
@@ -195,6 +206,12 @@ define_vars() {                                                 # {{{
 		readonly user_email_domain="${USER_EMAIL_DOMAIN_DEFAULT}"
 	fi
 	## }}}
+	## If sender_email_address wasn't defined (argument) {{{
+	if [ -z "${sender_email_address}" ]; then
+		## Use default value
+		readonly sender_email_address="${SENDER_EMAIL_ADDRESS_DEFAULT}"
+	fi
+	## }}}
 
 }
 # }}}
@@ -441,7 +458,9 @@ main() {                                                        # {{{
 Taille précédente pour cette sauvegarde/Previous size for this backup : ~${backup_dir_previous_size} ${min_size_unit} (compress).
 Taille actuelle pour cette sauvegarde/Current size for this backup : ~${backup_dir_current_size} ${min_size_unit} (compress).
 La différence de taille (~${backup_dir_compare_size} ${min_size_unit}) est inférieure au minimum attendu (${min_size}).
+
 ---
+
 The difference (~${backup_dir_compare_size} ${min_size_unit}) is bellow the minimum expected size (${min_size}).
 " >> "${user_email_template}"
 				### }}}
@@ -479,7 +498,7 @@ Recorded informations from previous tests :
 			### }}}
 			### Send email {{{
 			debug_message "| Send email content (${user_email_template}) to user email address (${RED}${user_email_address}${COLOR_DEBUG})."
-			mail -r "duplicati@duplicati.$(hostname --domain)" -s "Duplicati backup warning" "${user_email_address}" < "${user_email_template}" \
+			mail -a "From:${sender_email_address}" -s "Duplicati backup warning - ${user_dir}" "${user_email_address}" < "${user_email_template}" \
 				|| error_message "Can't send content (${user_email_template}) by mail to user (${user_email_address}).  See --debug option for more options." 23
 			### }}}
 		fi
@@ -558,6 +577,12 @@ if [ ! "${NBARGS}" -eq "0" ]; then
 			## Define var
 			readonly user_email_domain="${1}"
 			;;
+		--sender|--mail-sender|--sender-mail )## Define sender_email_address
+			## Move to the next argument
+			shift
+			## Define var
+			readonly sender_email_address="${1}"
+			;;
 		--debug )                             ## debug
 			DEBUG=0
 			debug_message "--- Manage argument BEGIN"