title: Using multiple smtp servers with same domain?
body: <p>I am using MailGun for sending emails and Zoho for receiving emails, which works fine.</p>
  
  <p>But then I wanted to enable sending from Zoho to be able to reply to received emails, so I added Zoho spf and DKIM to the domain along with MailGun, which also worked perfect emails from both servers are signed and sent correctly.</p>
  
  <p><strong>My question:</strong> is there any drawback from doing this? like for example domain get blacklisted, or flaged as spam?</p>
  
  <p><strong>My Second Question:</strong> why people dont do this? I can even add a third smtp server and separate email tasks: 1st server for transactional emails, 2nd server for bulk, 3rd server for receiving.</p>