OTTAWA— Canadian postal workers have voted in favour of strike action.That could happen as early as Sept. 26, shutting down mail delivery across the country .Direct mail printers have already found customers talking about putting campaigns on hold.The last postal strike saw direct mail volumes drop by 20% to 30% after the strike and took over a year to get volumes back to pre strike levels. Companies like Bell, Rogers, Enbridge Gas have started to push their customers to get their bills and make payments online. Some have said that 60% to 70% of every thing that is printed goes through the mail. A larger percent of Canada Post volume is direct mail with a continual shrinking volume of letter mail.  Outside postal workers vote was 93.8 per cent of urban postal operations workers and 95.9 per cent of rural and suburban mail carriers voting for strike action. A lot of direct mail printers and mailing houses surveyed expect a strike based on their contact with Canada Post employees. Last strike was in 2016.