I'm assuming you are asking about TeamCity's notifications. You can find the email templates on the data directory\config\_notifications\email. ".ftl" are the templates being used, while ".ftl.dist" are the examples in case you want to modify them. You can find more information here: https://confluence.jetbrains.com/display/TCD10/Customizing+Notifications
Hi Matias,
I'm assuming you are asking about TeamCity's notifications. You can find the email templates on the data directory\config\_notifications\email. ".ftl" are the templates being used, while ".ftl.dist" are the examples in case you want to modify them. You can find more information here: https://confluence.jetbrains.com/display/TCD10/Customizing+Notifications
Also as a side note, this is the youtrack forum, it would be easier to get help about teamcity topics if you posted this on the teamcity forums at https://teamcity-support.jetbrains.com/hc/en-us/community/topics/200366709-TeamCity-General-Topics