What happened on the server 3 weeks ago? (upgrade? updates?)-> Nothing like this.Environment details?osTicket-Versionv1.10.1 (9ae093d) — AktuellServer-SoftwareApache/2.4.33 (Unix)MySQL-Version5.6.39PHP-Version5.6.35no/broken image.Did you do what the error message suggested?-> the error message said to me, i have to check the inbox manuel. Thats not the solution, because i use a ticketsystem. The mails will not be forwarded to the ticketsystem. I have no idea.