It depends on multiple factors:
* Are logins rate limited?
* Do you have to enter a captcha after multiple failed attempts?
* How long is the password?
* Is the password complex?
* Is the account protected with 2-factor auth.
* What other security measures are in place?
If you have the ability to defeat the factors easily then the answer would be yes, if you don't then you life is going to be a lot harder at cracking email accounts.