As an additional security measure, we no longer allow emails to be sent from an alias email address. The email account/address used to send from your client device must match the email address as set up on the mail server.
Spammers use this method to fake the "from" addresses. This is called "spoofing" in the industry, which is essentially faking an email address.
You can still modify the "from" field; however the sending account on your computer or device must match the email account as set up on the mail server.
If you have questions, please email email@example.com