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Microsoft 365 from GoDaddy Help

What is SMTP Discovery?

Note: Are you looking for your Microsoft 365 SMTP settings? See our article on server settings instead.

SMTP Discovery, as part of the Advanced Email Security add-on, monitors email addresses that are sent mail using your domain name, but aren't already added as users or functional accounts in Proofpoint.

If you receive an SMTP Discovery Warning Report from Proofpoint, you'll be informed in the email if you need to add the address to your organization as a distribution list, end user address, or alias. Otherwise, you can mark it as an invalid account. If you don't see an email address in the report, see Email not in SMTP Discovery.

You need to be an admin to follow these steps.

Warning: If no action is taken within 4 weeks of receiving the report, it could impact mail flow for the affected email addresses.

Select the following to jump to any section:

Add a user address

You'll want to add a user when the email address is part of your Microsoft 365 account but hasn't been added in Advanced Email Security yet.

  1. Sign in to Advanced Email Security.
  2. Under Administration, select User Management > SMTP Discovery.
  3. Select the discovered address you'd like to add.
  4. Enter the Firstname and Surname.
  5. Select Create user account from the list, and then Apply.
  6. Select OK to confirm.

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Add an alias

When there's already an existing user in Advanced Email Security, you can add an alias. This should be the same email alias that's in your Microsoft 365 account.

  1. Sign in to Advanced Email Security.
  2. Under Administration, select User Management > SMTP Discovery.
  3. Select the discovered address you'd like to add.
  4. Under OR Add as Alias, enter an existing user's email address for the alias.
  5. Select Create user account from the list, and then Apply.
  6. Select OK to confirm.
    Add an alias

Mark as an invalid account

Identify a discovered address as invalid so mail isn't delivered to it.

  1. Sign in to Advanced Email Security.
  2. Under Administration , select User Management > SMTP Discovery.
  3. Select the discovered address you'd like to identify as invalid.
  4. Select Mark as invalid account from the list, and then Apply.
  5. Select OK to confirm.

Add a distribution group

You can add the address of an existing distribution group.

  1. Sign in to Advanced Email Security.
  2. Under Administration, select User Management > SMTP Discovery.
  3. Select the checkbox next to the distribution group address you want to add.
  4. Select Create functional account from the list, and then Apply.
  5. Select OK to confirm. It can take up to 90 minutes for these changes to take effect.

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Email not in SMTP Discovery

If the email doesn't appear in SMTP Discovery, add it as an alias or functional account. Here's how to add an alias:

  1. Sign in to Advanced Email Security.
  2. Under Administration, select User Management > Users.
  3. Select the address where the alias will be added.
  4. At the top of the page, select Aliases.
  5. Select ADD ALIAS.
  6. Enter your alias and select SAVE.

Here's how to add a functional account:

  1. Sign in to Advanced Email Security.
  2. Under Administration, select User Management > Functional Accounts.
  3. Select ADD A FUNCTIONAL ACCOUNT.
  4. Enter a Name (this is optional), Email address, and choose the Account type.
  5. Select Save. You'll see confirmation that the functional account updated.

Note: If the email address is a Microsoft 365 user in your Email & Office Dashboard and it wasn't added to Proofpoint, contact our GoDaddy Guides for help.

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