Hi!
Have the emails ever worked or is this the first time you are using them? If it's the first time, then it's a good idea to verify the configuration with the article.
Also, keep in mind that every user determines his/her own email alert settings. Make sure they have the desired alerts set on for each team member. You can view other users' alert settings from the Home tab / Email Alerts / Update Email Alerts for Multiple Users.
Some mail servers don't like the way we "impersonate" email addresses and block them, so you may need to also check with your email admin.
If you are still having trouble, our support team would be happy to help - just click on the Help Center link at the top right of your screen, then click Create Support Ticket.
Thanks!