Red Circle with sent emaild

Hello TexasTurtle22,

We would like to see how we can help you wit the Mail app. This would indicate the contact has been blocked. Check out this link for help with your blocked contacts: Block phone numbers, contacts, and emails on your iPhone or iPad - Apple Support

"You can also add a phone number or email address directly to your Blocked Contacts list in the Settings app.

1. Add the number or email address that you want to block to your Contacts. 
2. For phone numbers, go to Settings > Phone > Blocked Contacts > Add New. For email addresses, go to Settings > Mail > Blocked > Add New.
3. Select the contact that you want to block."

Cheers!