Ability to define a generic segment "Did (or did not) receive any emails today"
Currently it is not possible to define such a segment without specifying a delivery or a specific date. It could be potentially doable using a rule "Last send date (not) within the last 0 days" but Bronto does not allow 0 as a value in this rule (only 1+).
This generic segment could be very useful, e.g. when we want to deploy a particular mail second time in the day to an extra group of contacts but want to ensure people do not get the email again (or if we are not sure our segments overlap or not and want to deploy at separate times in the day).
Currently I have to define a specific segment "received message X" or 'last delivery date =Date X" to use it as exclusion (but the generic one would have worked better as it would not require changing date or delivery)