How to use the Email identifier to filter warm-up emails

This guide explains what to do when Snov.io warm-up emails appear in your inbox and how to remove them automatically using inbox filters in Gmail, Outlook, and other email clients.

Do you need the Email identifier?

How to enable the Email identifier

Find or change your phrase

How to set up a filter in your email client

Add an inbox filter in Gmail

Add an inbox filter in Outlook (Microsoft 365 / Outlook.com)

Add an inbox filter in Zoho Mail

After you start Email Warm-up, your mailbox joins a warm-up network. It sends and receives emails with other real mailboxes, which builds your sender reputation.

Do you need the Email identifier?

We recommend turning on the Email identifier if:

• You want warm-up emails sorted as soon as they arrive, without waiting for Snov.io to move them
• Your mailbox forwards emails to another mailbox. Snov.io labels emails only in the mailbox you connected, so warm-up emails still appear in the mailbox they're forwarded to
• You use automations or AI agents that read your inbox and need a reliable way to identify warm-up emails

How to enable the Email identifier

Go to Deliverability in the top menu and select Email warm-up.

In Warm-up settings, find the Email identifier section. Set the dropdown to On.

Snov.io generates a unique phrase and adds it to the body of every warm-up email your mailboxes receive.

What the phrase is for:

Find or change your existing phrase

Go to Email Warm-up. Click the three dots next to the mailbox and select Edit.

Open the Review tab. Your phrase is shown next to Email identifier.

To use a different phrase, go to the Warm-up settings tab and click the refresh icon (Generate new).

How to set up a filter in your email client

After you turn on the Email identifier, create a filter or rule in your email client that finds emails with your phrase. 

Set it to move these emails out of your inbox, either by archiving them or by moving them to a separate folder.

We also recommend adding a label, such as "Snovio warm-up", if your email client supports labels. You can then see all warm-up emails in one click.

For Gmail, Outlook, and Zoho Mail, follow the steps below.

Add an inbox filter in Gmail

Open Gmail and click the Show search options icon at the right end of the search bar.

In the Has the words field, enter your Email identifier phrase (e.g., Green-Fairy).Click Create filter and choose Skip the Inbox.

To add a label, select Apply the label and create one, such as "Snovio warm-up". To see all warm-up emails, click the label under Labels in the Gmail sidebar.

Select Also apply filter to matching conversations to clean up warm-up emails already in your inbox.

Click Create filter again to apply these settings.

Add an inbox filter in Outlook (Microsoft 365 / Outlook.com)

Open Outlook and go to Settings → Mail → Rules. Click + Add rule.Name the rule (e.g., "Warm-up filter").

Under Add a condition, select Message body includes and enter your Email identifier phrase (e.g., Green-Fairy).Under Add an action, choose one of the following:

• • Move to → select or create a folder (e.g., "Warm-up")
  • Mark as read

Click Save.

Add an inbox filter in Zoho Mail

Open Zoho Mail and go to Settings (⚙️gear icon) to find Filters.

Click + New filter and name it (e.g., "Warm-up filter").Under Conditions, set: Content → contains → your Email identifier phrase.

Under Actions, choose:

• • Mark as read
  • Move to folder
  • Add label

Click Save.