title: How to use multiple SMTP in django_mail_admin (Gmail & Outlook)
body: <p>We are using django_mail_admin in our project to send and receive emails.
  Our requirement is to send email on both accounts Gmail and Outlook.
  1- Gmail Account will send E-mail to Gmail account using Gmail SMTP
  2- Outlook Account will send E-mail to Outlook account using outlook SMTP.
  NOTE: Switch SMTP is a function to change SMTP according to Gmail and Outlook.
  Use of single Gmail account :-
  Gmail is sending Email to Gmail account, Sender and Receiver both from Gmail, working fine.
  Use of single Outlook account :-
  Outlook is sending Email to Outlook account, Sender and Receiver both from Outlook, working fine.
  Use of Gmail and outlook together
  When we use Gmail and outlook together and we Switch SMTP Gmail to Outlook, then we are facing issue (Sender not changing, Gmail Receive email from Gmail but Outlook Receive email from Gmail)</p>