Changing, Adding, or Removing an Email Address
The email address associated with your Trello account, also referred to as an account credential, can be used to log in to Trello, recover an account when the password has been forgotten, or as a way for other Trello members to be able to add you to their boards for collaborating on a project. You can have more than one account credential at a time.
Adding an email address
To add additional email addresses as login credentials go to your account settings page at https://trello.com/your/account and select "Add A New Email Address" from the Credentials section. A confirmation email will be sent to the email address that you have added as a credential, click the link in the email to confirm your email address.
Any email associated with your Trello account can be used to log in to Trello, even if it's not the primary email.
Please note: It is not possible to add an email credential of an email address that is already in use with another Trello account. For information on merging Trello accounts please see this article.
Deleting an email address
To delete an email credential, click the "X" in the top right corner of the box for that credential and then confirm that you would like to delete the credential.
Setting a primary email
At this time, notifications are only sent to the primary email credential. The primary email credential can be set by clicking the "Set as primary email" link underneath an email address that is not currently set as your primary email credential.
Changing your email address
If you need to change your email address, first follow the "Adding account credentials" steps above to add the new email address to your account. Once you've received the confirmation email and confirmed your new email address, go back to your account page and click on the "Set as Primary Email" link for the new email address. After you’ve selected the new primary address, you can follow the steps above to delete the old email address from your account.