LG Phone outgoing mail

Have an LG phone and I can't send emails from it. I can receive them but can send. the emails are info@companyname.com. I set the port to 587.
My Comcast.net email does send emails from the phone.

Help please!

Are you trying to send through your company mail server and it's not working, or are you trying to send From: as your company email address through the Comcast smtp servers?