Why the Doorbell Always Wins
From your dog's side of the door, the logic is flawless. A stranger arrives at the boundary of her territory, she barks, and the stranger leaves. Every single delivery confirms that barking works, and with several riders a day she gets more rehearsals in a week than most training plans provide in a month. Shouting over her adds your voice to the alarm without changing the outcome, and hauling her away by the collar after she has already erupted teaches her the door area is tense, not that settling pays.
The way out is to give the knock a different meaning and a different job: the bell predicts going to a mat, staying there, and getting paid — while a barrier removes any chance of her reaching the door itself while the habit is being rebuilt.
The Physical Setup Comes First
Fit the management before the training. A gate across the hallway, a door you close before opening the front door, or a pen arrangement in the hall means no delivery can ever become a lunge, a slip-out, or a frightened rider — a genuine safety point, since riders meet dogs at doors all day and a loose, aroused dog at the threshold is how bites and escapes happen. Your dog should never have physical access to an opening front door during this work, full stop.
Choose her station: a mat or bed positioned where she can hear the door but not see straight out of it, far enough back that staying there is achievable. If parcels land on a step or in a box, consider a parcel box seriously — every delivery that does not require an opened door is a rehearsal she never has.
Training the Knock-to-Mat Sequence
Build the behaviour when no rider is due. Record a doorbell sound or have a household member knock, cue her to the mat, reward generously for going and staying, release, repeat. Short sessions, several times a day, until the knock itself sends her trotting to the mat expectantly — that is the moment the sound has changed meaning. Then stage deliveries: a family member plays rider, knocks, waits while she settles on the mat, and you open the inner barrier only as far as the arrangement allows, rewarding her throughout for staying put.
Food riders at busy evening hours, with smells and motorbike noise, are advanced level; a midday parcel drop is the training ground. If she breaks and erupts, do not punish — the rehearsal was simply pitched too hard; note what was different, make the next one easier, and keep the barrier doing its job in the meantime. Between deliveries, watch her window behaviour: a dog allowed to patrol the front window barking at every passer-by is rehearsing the same arousal all day, so reward quiet looking, call her away to her mat, and close the blind during the busiest delivery windows if she cannot yet disengage.
Making It Stick Across the Household
Door chaos is usually a household inconsistency problem: one person holds her collar, another lets her greet the rider, a teenager opens the door with her loose because it is quicker. Agree the single routine — bell, mat, barrier closed before the front door opens, reward after — and apply it to every caller, including friends, until it is boring.
Several deliveries a day also means several chances to notice progress honestly: count how many arrivals she settles for this week against last week rather than judging by the one spectacular failure. Writing the mat cue, barrier rule, and reward step into KinsLe Family Sharing keeps the door routine identical for partners, family, and guests, so the training you do at midday is not undone by whoever answers the door in the evening.