If you use a transactional template that has already been tagged, additional tags used in the header or API request are discarded.
Create transactional mail streams with their own analytics by including a tag with the message.
Messages sent without a tag will be grouped together as 'untagged' on the transactional dashboard.
Transactional messages can be tagged via SMTP Relay, API, or Template methods.
SMTP Relay can use the header X-Transactional-Tag:
X-Transactional-Tag: signup
API can use the tag parameter:
"tag": "signup",
SMTP Relay can use the header X-Transactional-Template:
X-Transactional-Template: MsmsEaZZDxYyBJyVXXwA2A
API can use the template parameter:
"template": "MsmsEaZZDxYyBJyVXXwA2A",
Adding a Message Tag to a transactional template will cause all messages that use this template to be tagged automatically.
