Updated email.md

Author: lvukadinovic-ib

email.md

@@ -25,7 +25,7 @@ Fields `from`, `to`, and `subject` are required. The message must also contain a
 Keep in mind the following restrictions while using a trial account:
 
 - you can only send messages to verified email addresses,
-- you can only use your email address with the Infobip test domain in the following form: `YourUserName@selfserviceib.com`
+- you can only use your email address with the Infobip test domain in the following form: `YourUserName@selfserve.worlds-connected.co`
 
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