Is there any restriction in SendGrid to use numbers in the "user friendly name" in the From field for easy identification?
For example: Would like to use "123456" pravar@pravar.com instead of "Pravar" <pravar@pravar.com". However, when I use number, unable to relay such emails with the following error.
"The from address does not match a verified Sender Identity. Mail cannot be sent until this error is resolved"
But when I change the number to the name, the mail delivery works normal. The sender verification has been completed with domain authentication in our case.