myemails.caYes, myemails.ca addresses are real.
myemails.ca is a working email domain. If someone gave you an address ending in @myemails.ca, it's correct, and mail you send to it is delivered.
Why isn't it a Gmail or Outlook address?
Some people use their own domain for email instead of a provider's. It works the same way.
Do I need anything special to write to it?
No. Write to it from your usual email account, as you would to any other address.