Around 150 postal workers in Carterton and Witney in Oxfordshire were to strike this week after management refused concessions to avoid a stoppage.
Action was planned for Thursday and Friday this week and Monday next week over management bullying.
At the heart of the dispute is the suspension of a Carterton union health and safety rep for failing to complete his delivery round.
As laid down by procedure, he had informed the manager before he went out that the amount of mail was impossible to deliver.
After finishing his time span he returned the excess mail to the office. He was suspended and is now facing charges of wilful delay, a sacking offence.
The workers at Witney have also been suffering from excessive workloads and management bullying.
A group of workers were given suspended dismissals after walking out unofficially over these issues.
Carterton and Witney workers may need solidarity from elsewhere in order to win.