Notices without spam

Sending multiple notices at once can be considered as spam by SL.

The "excessive" notices are silently discarded (SL reports the notice has been sent but actually notice is not delivered).

Using delivery delay

To send notices in safe way, use the "Delay between notices" option:

This option appears only if you select more than 3 groups.

It adds a small delay between groups, delivering the notice in safe way. 3 (or better 5) seconds delay is recommended.

Read more

Also read Safe notices delivery to know more about notices delivery.