ec_error_mode — set the error mode to "fail" or "continue"
ec_error_mode affects how Sieve handles certain kinds of errors (for instance, passing incorrect parameters to Sieve functions, failed includes, low memory conditions). The default is to
fail the incoming session with a transient error response, but you may set it to
continue to have the script continue executing past the failure point.
The ability to change this behavior was introduced in 2.2, and the default was changed to
fail. In prior releases, the default was effectively
continue and this could not be altered.