The Canadian Union of Postal Workers is unhappy over new service cuts to small communities.
Union officials say Canada Post is changing the way mail is sorted by having it shipped to larger cities rather than sorted locally in small communities.
Canada Post has already started removing some mailboxes from smaller communities.
Gord Fischer of the Canadian Union of Postal Workers said union members are concerned about the changes.
"We want to make sure the customers in the rural areas get good service," said Fischer.
He said the service will be slower now as a result of the changes.
"Where they used to have overnight service in Brandon, within city mail, now of course it’s going to be in a lot of cases delayed," said Fischer.
"It’s going to have significant customer impact."
He said the union is also worried about job cuts. But Canada Post spokesperson John Caine said all of the company’s existing employees’ jobs are secure.
"As we move forward, if someone leaves, chances are we won’t replace them," said Caine.
Caine added the crown corporation must make changes in order to stay viable since lettermail volume has dropped significantly.
All mail in local communities is expected to be delivered within two days.