Apple Mail -- Send Email, Not Read Email

On the off chance you want to be able to send email from Apple Mail, but you do not want to read any email at all in Apple Mail, here is how to set this up using Drexel's Office 365 (or another email).
Basically, we're going to set up Apple Mail as you normally would to read and send email using your Drexel Office 365 email (or another email account).
But we're going to then set Apple Mail to *NOT* show you your email messages, or show or sound any notifications when you receive email. (In other words, out of sight, out of mind.  )
This will also ensure that if you click a "mailto" link in a webpage (hyperlink that opens up your default email client), Apple Mail will open up so that you can send your email, but you will not be able to read any email.
     1. Make sure "Apple Mail" is set to be your default email client on your Mac.
          (a) Visit the webpage below for instructions.
               i. https://support.apple.com/en-us/HT201607
          (b) Then return to this webpage.
     2. Follow the instructions at the "Apple Mail" on a Mac computer or laptop section at the webpage below.
          (a) Apple Mail Set-Up
               i. Or follow the instructions provided to you to set-up your Apple Mail account with another email account than your Drexel Office 365 email account.
          (b) Then return to this webpage.
     3. In the left "Mailboxes" panel in Apple Mail, click "Outbox."
     Click Outbox in Apple Mail.png
     4. At the top of the screen, click "View," then select "Hide Favorites Bar."
     Hide Favorites Bar in Apple Mail.png
     5. At the top of the screen, click "View," then select "Hide Mailbox List."
     Hide Mailbox List in Apple Mail.png
     6. At the top of the screen, click "View," then select "Preferences."
     Apple Mail preferences.png
     7. On the "General" tab, for "New messages sound," select "None."
     None for New messages sound in Apple Mail.png
     8. On the "General" tab, for "New message notifications," select "VIPs."
     None for List Preview under Viewing in Apple Mail.png
     9. On the "Viewing" tab, for "List Preview," select "None."
          (a) Click the small circled red "x" to close the Viewing/General/Preferences pop-up window.
          x to Close Apple Mail Preferences.png
     10. Send an email to yourself (either your Drexel or a non-Drexel email) account, and check your Drexel or non-Drexel email account to make sure it arrives.
          (a) You'll briefly see the email in the left panel before it gets sent out.
          (b) It may take up to 5 minutes for the email to arrive at its destination, though usually not that long.