How to add a countdown timer into Gmail
Gmail is one of the easiest email clients to add a timer into. You can add a timer into your email template in Gmail in just a few simple steps.
Step 1: Create a timer
Go through the Mailtimer wizard to create a timer. When you click Publish on your timer, Mailtimer will generate you a short HTML snippet containing an <img>
tag. Copy just the URL of the image.

Step 2: Compose an email
When composing a message, click on the Insert photo button.

Then, from the “Web Address (URL)” tab, insert your timer’s URL. Note: You should only insert the actual timer URL without copying the whole snippet that includes HTML tags.

Finally, click the Insert button.

That’s it! You’re done. Send your email.