There is no definitive answer to this question, as it largely depends on the specific circumstances of each case. However, if you have deleted your email account and your contacts are still stored in your old email address book, they may be lost if you decide to re-establish your email account.
Delete Previously Used Email Addresses from Gmail Auto-Complete List
Everything connected with that account will be deleted from your phone when you delete it. This includes email, contacts, and settings, among other things.
You’ll lose access to data across a number of websites if you delete your Google account. If you have an Android smartphone, you will also lose access to any contacts linked to this account as well as any data that has been backed up using Android Backup services. Finally, the username will be deleted permanently.
Deleting an account from your phone is as simple as removing it. It’s similar to logging out of a Google account. All data connected with the account will be kept on Google’s servers. You may reinstate the account on your phone or access it online using this information.
You must inform everyone about the transition. Send an email to everyone in your contact list with your new address, including friends, family, and business contacts. Address the message to yourself with the new address and BCC everyone else.
Deleting an Email Account From the iPhone Does Not Delete It. When you delete an email account from an iPhone, the email account and address are not deleted. You can still receive and send emails using your web browser or other email programs linked to the account.
