Union officials are trying to thrash out a new deal to end the strike - but workers are holding out until they are guaranteed no victimisation.
The workers walked out over management bullying, and were demanding an independent inquiry – and demand which management had refused.
A spokesman for the CWU said: "I believe it is more optimistic today. First and foremost we are looking for a guarantee that no individuals will be victimised when they return to work.
"And we are asking for an unequivocal commitment that the appointed independent body overseeing the employee and industrial relations review will have the power to address our members' concerns without interference from Royal Mail."
One striker told the Belfast Telegraph: "It is looking good and as long as there are no unforeseen developments we could be back within hours."
The CWU had repudiated the strike and repeatedly ordered its members back to work.
By libcom.org news