My website generates automated emails for email verification.

User story: The user didn't get the automated email, and requests a new one. The user receives the new email along with the old email.

Since the contents are identical (except for the href path in one of the links), gmails trims the second email with the correct link, and the user is unable to verify its email.

How can I prevent gmail from trimming a 2nd email that has graphically the same content?

Thanks

My website generates automated emails for email verification.

User story: 
The user didn't get the automated email, and requests a new one. 
The user receives the new email along with the old email.

Since the contents are identical (except for the href path in one of the links), Gmail trims the second email with the correct link, and the user is unable to verify its email.

How can I prevent Gmail from trimming a 2nd email that has graphically the same content?