Hi! I can disable checkbox in protocols "Sender address must be fully qualified (reject_non_fqdn_sender)"

Error:

JavaScript error encountered in method ZaXFormViewController.prototype._saveChangesCallba ck message: this._currentObject.attrs[L].join is not a function fileName: https://mail.domain.local:7071/zimbr...v=091118112207 lineNumber: 8037 stack: ()@https://mail.domain.local:7071/zimbraAdmin/js/Admin_all.js.zgz?v=091118112207:8037 ((void 0))@https://mail.domain.local:7071...
How i can disable this option?