The fight has been taken to the very top - with Prime Minister Gordon Brown, Business Secretary Peter Mandelson and Scotland's First Minister Alex Salmond all alerted to the controversial decision to shut the Sheuchan Street branch in Stranraer.
Politicians locally are also being constantly updated on the situation as the clock ticks down to the scheduled date for closure of the branch next Wednesday.
Residents are incensed by moves to axe the branch, confirmed recently as part of wider measures - which would see the only Post Office serving a town of around 11,000 people situated in the Tesco supermarket.
They have been monitoring two legal actions in England, where challenges were made to decisions to close Post Offices.
One 74-year-old woman from Gloucestershire - who suffers from acute osteoporosis - claimed the closure of her branch was in breach of the Disability Discrimination Act 2005, which demands equal services for everyone.
James Goudie QC, representing another disabled woman in court, was seeking a ruling from the High Court that the Secretary of State's decision over Post Office closures was unlawful and in breach of duties under the Disability Discrimination Act.
He said: "The Secretary of State should have carried out a disability impact assessment, which he has not done. Harm may have occurred which is irreversible, but it is by no means too late for an assessment to be made."
One Sheuchan Street Post Office user said: "If we can do the same, we'd have a good case. I think the woman down south makes a perfectly good point and I know several people who will find it tricky to get all the way to Tesco. Even once there, they have to negotiate checkouts and trollies and crowds of shoppers - never mind where they will park."
However, as the Gazette went to press last night, there were unconfirmed reports that both these cases had been dropped.
Sheuchan Street Post Office remains as busy as ever. Sub-postmistress Liz McIntyre confirmed on Monday: "It's non-stop in here, it always is. I will be sad to leave my post if it comes to that, but it's encouraging to know people are still fighting for us."
Councillor Willie Scobie said: "This Post Office has in the past and still does provide a first-class service which is a lifeline for much of the community and surrounding area - and even further afield. It is still used very heavily, every day."
Galloway MP Russell Brown added: "We are all frustrated at how Post Office Ltd has largely ignored strong and legitimate arguments against their plans for our area, and I will continue to make the case to them - particularly in the case of the Sheuchan Street branch - that they have made a big mistake."
Last night, a spokesman for Post Office Ltd said: "We are unable to comment."
emma.barlow@gallowaygazette.com