There is no such thing as a delivery emergency. They just do not happen.
Delivery is fluid, delivery is changing, delivery is complex.
But when delivery goes bad it is not an emergency. There is no need to call up an ISP person at home on a Saturday afternoon and ask them to remove the filters. (And, BTW, experience indicates if you do this that you may have future delivery issues at that ISP.)
I’m sure that people will provide me with examples of delivery emergencies. And, in some cases I might even concede that the receivers will be happy to receive email immediately when it was sent. However, email as a protocol was designed for store and forward. It was not designed to transmit messages instantaneously from sender to receiver. Sure, it works that way much of the time these days. On the whole the Internet is fairly reliable and major servers are connected 24/7 (which wasn’t always the case).
Among many people, particularly recipients and ISP employees, there isn’t the expectation that bulk email is instantaneous. This leads to the belief that delivery problems are not an emergency. Everyone faces them, they get dealt with, life goes on. Demanding an escalation to deal with a “delivery emergency” may backfire and slow down how long it takes to get a response from an ISP.