If you want to bcc all Toronto City Councillors, here is a compiled list of their email addresses that you can copy and paste into the bcc line of your email message:
councillor_crisanti@toronto.ca, councillor_holyday@toronto.ca, councillor_morley@toronto.ca, councillor_perks@toronto.ca, councillor_nunziata@toronto.ca, councillor_pasternak@toronto.ca, councillor_perruzza@toronto.ca,councillor_colle8@toronto.ca, councillor_bravo@toronto.ca, councillor_malik@toronto.ca, councillor_saxe@toronto.ca, councillor_matlow@toronto.ca, councillor_moise@toronto.ca, councillor_fletcher@toronto.ca, councillor_chernoslin@toronto.ca, councillor_burnside@toronto.ca, councillor_carroll@toronto.ca, councillor_cheng@toronto.ca, councillor_bradford@toronto.ca, councillor_kandavel@toronto.ca, councillor_thompson@toronto.ca, councillor_mantas@toronto.ca, councillor_myers@toronto.ca, councillor_ainslie@toronto.ca, councillor_shan@toronto.ca