To insert an emoji symbol in subject line which is always visible no matter recipients read this email in webpage, mobile, or Outlook, please do as follows:

1. Open the Character Map dialog box with one of below ways:

1. In Windows 10, please click the Search icon at the Taskbar, type Character Map into the search box, and then click the Character Map (Desktop app) in the search results. See right screenshot:
2. In Window 8, press Ctrl + Esc keys together (or Win key) to get into the start screen, next type Character Map directly, and then select the Character Map App from the search results.
3. In Windows 7, please click Start > All Programs > Accessories > System Tools > Character Map.

2. Now the Character Map dialog box comes out, please (1) check the Advanced View option, (2) choose Unicode Subrange from the Group by drop down list, (3) click to select Symbols & Dingbats in the popping out Group By dialog box, and finally (4) close the Group By dialog box. See screenshot below:

3. Now you return to the Character Map dialog box, please (1) click to select the emoji symbol you will insert, (2) click the Select button behind the Characters to copy box, and then (3) click the Copy button. See screenshot:

4. Now you have copied the specified emoji symbol. Shift to Outlook, and click Home > New Email to create a new email.

5. Put the cursor in the subject line, and press Ctrl + V keys together to paste the specified emoji symbol. See screenshot:

6. Compose the email as you need, and then send it.

If you want to add the specified emoji symbol in the subject line of every new email in Outlook, you can apply Kutools for Outlook’s Add date into subject when creating new email option to achieve it.

1. Follow the Step 1-3 we introduced in the first method to copy the specified emoji symbol.

2. In Outlook, please click Kutools > Options. See screenshot:

3. In the opening Options dialog box, (1) go to the New tab, (2) check the Add date into subject when creating new email option, (3) paste the specified emoji symbol into below box with pressing Ctrl + V keys simultaneously, and (4) click the OK button. See screenshot:

From now on, the specified emoji symbol will be added into the subject line of every new email automatically. And no matter recipients read the email in any email reader, the specified emoji symbol is always visible.

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