THE CANADIAN PRESS -- Canadians may feel the effects of rotating postal strikes to a much greater degree starting this week as cuts to mail delivery take effect.

Canada Post says delivery in most cities will be limited to Mondays, Wednesdays and Fridays.

Spokesman Jon Hamilton says a final call will be made today on whether all cities will be affected, based on mail volumes.

Hamilton says a week-and-a-half of rotating strikes have scared customers away and a drop in mail means the post office has no choice but to bring in service cuts.

Postal workers in Red Deer spent the weekend on strike and employees in 10 cities across the country walked off the job next.

Rotating strikes began late Sunday in Corner Brook, N.L., Fredericton, N.B., Breton, N.S., Trois-Rivieres, Que., Sherbrooke, Que., Cornwall, Ont., Windsor, Ont., Niagara Falls, Ont., Regina, Sask. and Nanaimo, B.C.

The two sides spent the weekend negotiating but there is no sign of progress.

The Canadian Union of Postal Workers has said it's willing to negotiate a reasonable deal but won't accept Canada Post's demands for concessions.

In a weekend statement, the union also said Canada Post management was trying to start negotiations over "from the beginning" and had withdrawn a number of previously tabled proposals.