At the time when I put a email address in I get a server error message. The log file contains the following lines :
[02-Aug-2016 20:39:53 +0200]: Warning: Call to deprecated function Q(); See bc.inc for replacement
[02-Aug-2016 20:39:55 +0200]: Warning: Call to deprecated function Q(); See bc.inc for replacement
[02-Aug-2016 20:40:19 +0200]: Warning: Call to deprecated function Q(); See bc.inc for replacement
[02-Aug-2016 20:40:21 +0200]: Warning: Call to deprecated function Q(); See bc.inc for replacement
[02-Aug-2016 20:40:22 +0200]: <k6fd53jv> Warning: Call to deprecated function rcube_parse_host(); See bc.inc for replacement
[02-Aug-2016 20:40:35 +0200]: <781bib6l> PHP Error: Request security check failed (POST /?_task=mail&_action=autocomplete)
Where can sit the problem? It's also when I move messages to an other folder
Resolved,
PHP7 was activated on my server. I put it back to 5.6 and problems solved