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# Added Sender id in send a transactional email

[Send a transactional email](https://developers.sendinblue.com/reference#sendtransacemail) has been extended and it's now possible to send a transactional email from a specific sender IP using sender `id` parameter.

This is useful for dedicated IP users who use senders on different IP's but with the same email.\
If you want to send an email from a specific IP, you can pass the `id` of the respective sender in the request body.

Note: sender `id` parameter will be ignored if `sender.ip` is passed in headers in request body.