pick one solution or combination of both

- disable AV check for authentified user
/etc/rspamd/local.d/settings.conf
  # Disable some checks for authenticated users
  authenticated {
    priority = high;
    authenticated = yes;
    apply {
      groups_disabled = ["antivirus"];
    }
  }

- disable AV check for a list of IP, maybe network
  # `whitelist` points to a map of IP addresses. Mail from these addresses is not scanned.
  whitelist = "/etc/rspamd/antivirus.wl";

- disable the soft reject for authentified users

/etc/rspamd/local.d/settings.conf
authenticated {
        priority = high;
        authenticated = yes;
        apply {
                symbols_disabled = ["FORCE_ACTION_CLAM_VIRUS_FAIL"];
        }
}


- retransmit more time but with a low timeout 10t*5s