While adding cname getting error Illegal characters in destination part. 6 Invalid Domain destination. 6

Hosting Support
1

while adding destination as return.smtp2go.net i am getting the error Illegal characters in destination part. 6 Invalid Domain destination. why is this so? i am doing this to link my account with gmail for replying to emails

2

Did you try to digit the destination domain without spaces? If not that’s the error.