added mail option for centos 55

duplicity-backup.conf.example

@@ -160,6 +160,7 @@ EMAIL_SUBJECT=
 
 # command to use to send mail
 MAIL="mailx"
+#MAIL="mail"
 #MAIL="ssmtp"
 
 # TROUBLESHOOTING: If you are having any problems running this script it is

duplicity-backup.sh

@@ -241,7 +241,9 @@ email_logfile()
           elif [ "$MAIL" = "mailx" ]; then
             EMAIL_FROM=${EMAIL_FROM:+"-r ${EMAIL_FROM}"}
             cat ${LOGFILE} | ${MAILCMD} -s """${EMAIL_SUBJECT}""" $EMAIL_FROM ${EMAIL_TO}
-          fi
+	  elif [ "$MAIL" = "mail" ]; then
+	    cat ${LOGFILE} | ${MAILCMD} -s """${EMAIL_SUBJECT}""" $EMAIL_FROM ${EMAIL_TO} -- -f ${EMAIL_FROM}
+	  fi
           echo -e "Email alert sent to ${EMAIL_TO} using ${MAIL}" >> ${LOGFILE}
       fi
   fi