What is the gatewayemail for TextNow texting message?

If I want to send an email to a TextNow number 123-456-7890, how ?

If you know the username of the textnow account, you can send email to username@textnow.com. I just tested it.

Don't know how to do it with only a phone number, though.

Did you email "username@textnow.com" and received a text message at the associated textnow number?
I just tried and got this: "The response from the remote server was:
550 5.4.1 Recipient address rejected: Access denied. AS(201806281) [TO1CAN01FT010.eop-CAN01.prod.protection.outlook.com]"

I sent a text to an email address - it came as username@textnow.me - I was able to respond to the message from my email

confirm same

Whoa! Jamie thank you !!!!!