An Interac e-Transfer is a fast, secure and convenient way to send money to anyone in Canada from within the security of your online banking service. It uses email and text messaging for fast notification to the recipient that a transfer has been sent, while the participating financial institutions transfer the funds using established and secure banking procedures.
To send an Interac e-Transfer, all you need is an email address, online access to your bank account at a participating financial institution and the email address or mobile phone number of the person that you are sending money to. Email and/or text messages carry the notification while the financial institutions use existing payment networks to transfer the money to any financial institution in Canada.
Also you can check the following links
RBC Royal Bank E-mail transfer
TD E-mail Transfer
Scotia Bank E-mail Transfer
CIBC E-mail Transfer