delchrys:
but if the 12601000UL is running, the loop just waits and will never see a change of the switchpin.
So i have to wait until the delays is finished???
No it does not 
You are confusing "delay(12 * 60 * 1000UL)" with "unsigned long delay = 10 * 60 * 1000UL".
All I did was assiging two different values to a variable called "delay" depending on the state of a switch. After that you can use that variable "delay" in you millis()-based delay.
unsigned long delay;
if(digitalRead(SwitchPin)){
delay = 1 * 1000UL;
}
else{
delay = 12 * 60 * 1000UL;
}
if(millis() - previousMills >= delay){
previousMillis = millis();
//do what you want to do
}