Thanks for your anwser. Yes, I made all the previous Postie updates without any problem but this one gives the following apache error :
[Tue Nov 14 16:36:21.791673 2017] [:error] [pid 2155] [client 172.16.1.12:4438] PHP Warning: require_once(/home/tech/doc-tech/wp-content/plugins/postie/lib/fException.php): failed to open stream: No such file or directory in /home/tech/doc-tech/wp-content/plugins/postie/postie.class.php on line 2, referer: https://tech.xyz.fr/doc-tech/?p=3398
[Tue Nov 14 16:36:21.791703 2017] [:error] [pid 2155] [client 172.16.1.12:4438] PHP Fatal error: require_once(): Failed opening required ‘/home/tech/doc-tech/wp-content/plugins/postie/lib/fException.php’ (include_path=’.:/usr/share/php:/usr/share/pear’) in /home/tech/doc-tech/wp-content/plugins/postie/postie.class.php on line 2, referer: https://tech.xyz.fr/doc-tech/?p=3398