Can't Create More Than One SMTP Server in Apple Mail

Can't Create More Than One SMTP Server in Apple Mail

Hi,

I have 2 email addresses through Zoho and am using Apple Mail as my email client.  For whatever reason I can't seem to get the second address to send outgoing mail.  When I try to add the first email address' SMTP setting to the second address it doesn't work (won't send), and the application won't allow me to create a second Zoho SMTP server.  I'm setting this up as POP, but that shouldn't affect the outgoing mail so much (I'm able to receive mail at both addresses).

MacBook Pro, High Sierra

Help?

Thanks!