The union representing about 55,000 Canada Post employees has called for a countrywide overtime ban, saying its negotiators will continue to review the latest offers from the mail carrier.

Canada Post workers won’t be walking off the job even though a last-ditch effort to avoid another strike fell short of what the Crown corporation called “meaningful progress.”

Canada Post said on Friday that operations will continue, but customers may face delays due to a union-imposed ban limiting workers to eight-hour shifts. The Canadian Union of Postal Workers (CUPW) announced an immediate nationwide overtime ban,