Contact Us Have questions or want to get involved? Contact MiVolunteer to learn more about our programs, volunteer opportunities, and how you can make a difference in the community. EMAIL US VPORTAL HELP CENTER GENERAL SUPPORT Name Email Message SEND EMAIL VOLUNTEER SUPPORT Name Email Message SEND EMAIL Follow Us On Social Media. Facebook Instagram Mailing Address Looking to mail something to us? Our address is 3-1125 Dundas St. E., Mississauga, ON L4Z 4E2.This is not a physical address, please do not come in-person. Easy volunteering - together as a community.