Add Tag External each time the mail is answered.

[jmavalos]

Good day
Every time an external responds to my email, it adds a new "External" tag to the email.
How can I prevent it from tagging again if it is already tagged?

[gfleming]

Are you configuring Disclaimer under Mail Setting?

You might have better luck using DLP Rules which can have granular rules to exclude tagging:

https://community.fortinet.com/t5/FortiMail/Technical-Tip-Append-subject-with-specific-keyword-if-th...