Duplicate emails.

Question

I am receiving duplicate emails on two of my three email addresses. An email that comes to one is also showing up under another. When I delete the message from one address account, it also deletes it from the other. These should be two separate emails.

Answer 1

Hi Robert Olsavsky

I understand how frustrating it is when emails from different accounts start mixing together like this.

Please help clarify a bit more so I can guide you precisely:

• Are the two email addresses from the same provider (e.g., both Outlook.com, or Gmail)?
• What account types are they (POP / IMAP / Exchange)?
• Did this start recently after adding or changing an account?

In the meantime, please try the following in Classic Outlook:

1, Check if both accounts are actually the same mailbox

• Go to “File” > “Account Settings” > “Account Settings”
• In the Email tab, review the Email Address + Server

If two accounts use the same server/username (even if display names differ), they may be duplicating.

2, Check delivery location (very common cause)

• In Account Settings, switch to the “Data Files” tab
• See if both accounts are delivering mail into the same data file (.PST/.OST)

If yes, Outlook will show the same messages across accounts.

3, Quick isolation test

• Temporarily remove one of the affected accounts: File > Account Settings > Account Settings > choose account > Remove
• Restart Outlook and check if duplication stops

This helps confirm whether the issue is caused by overlapping account configuration.

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