If you are deleting one account from one device, then yes, your emails will be on every device they were previously on. If you are actually deleting the services and deactivating the account from one device, you will not have the emails on your ot.
This page details the steps to delete an unused or unwanted e-mail account, not how to remove specific contacts. As you may have guessed, the answer to this question depends on the e-mail client or webmail service you use. It should also be noted that with many e-mail services, your account expires if it is not used for an exceptionally long period. To proceed, choose your e-mail client from the list below and follow the instructions.
To close an Outlook.com e-mail account, you'll need to delete your entire Microsoft account. All e-mails and contacts will be permanently deleted as well as any associated accounts (e.g., OneDrive, Xbox, Skype, etc.) will no longer be accessible.
If you use a Yahoo! account key instead of a password, you must first disable the account key. Review this Yahoo support document for more information.
NoteIf you have children with Yahoo accounts, and yours is the Parental account, you must close the Child accounts first, and the Parental account after.
You will automatically re-activate your account if you sign into it again in the 'hold period' of 40 days. This time period is extended to 90 days in Australia and New Zealand and 180 days in Brazil and Taiwan. After this hold period, your account and its associated data will be permanently deleted.
These instructions only work with Outlook 2007, 2010, and 2013.
In just a few steps, you can shut down your entire Yahoo Mail account and revoke access to your email address, remove all your emails, and prevent people from messaging you.
Deleting a Yahoo Mail account means not only that your emails will be removed and you'll lose access to your account, but you'll also no longer have access to your My Yahoo settings, your Flickr account and photos, and other data stored in Yahoo's services.
If you're paying for any Yahoo subscription services, remember to cancel these subscriptions first to avoid unexpected payments. The same is true if you have a Flickr Pro membership.
Closing your Yahoo account will not cancel automatic charges associated with your account. Once you close your Yahoo Mail account, anyone who tries to send a message to the email address will immediately receive a delivery failure message. To avoid confusion and concern, be sure you tell your friends and contacts that you are about to close your Yahoo Mail account — both from the email address you plan to use in the future (so they can easily reply to reach you) and from your Yahoo Mail address (to make sure the message is received).
See the section at the bottom of this page for more information on what will happen after you delete your Yahoo email address and account.
Open Yahoo's 'delete user' page and enter your username. Click Next.
If you don't see an option to cancel your account, and think you might have a BT Yahoo Mail account instead, see below.
You can recover your forgotten Yahoo Email password if you're not sure what it is.
Enter your password. If you have an Account Key set up, Yahoo will send a message to your mobile phone to authenticate you.
Read the text on the page titled 'Before continuing, please consider the following information.' It details what you will lose when you delete your Yahoo Mail account. Click or tap the Continue button.
Enter your email address once more into the field provided.
Select Yes, terminate this account.
You'll know it worked if you see a message that reads 'Your account has been deactivated and scheduled for deletion.'
Click or tap the Sounds good button to return to Yahoo's homepage.
In some cases, Yahoo won't actually remove everything for up to 180 days, but that depends largely on the country you signed up from. Data connected to a Yahoo Finance Premium account might be kept for three calendar years.
If you got your Yahoo Mail account with British Telecommunications (BT), you cannot cancel the service using the Yahoo Mail account termination page. You can, however, contact BT directly to have your Yahoo Mail Premium account deleted.
Here are some important things to be aware of when it comes to deleting your Yahoo account:
The message might say something like this:
However, this message will no longer be seen if you reactivate your account as described above.