Gmail Error - "550 Please turn on SMTP Authentication in your mail client..."

Here we will cover what to do when encountering the following error when sending emails from Gmail using an account created with InMotion Hosting:

550 Please turn on SMTP Authentication in your mail client, or login to the IMAP/POP3 server before sending your message. mailxxxxx.google.com[IP]:PORT# is not permitted to relay through this server without authentication.

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Checking the DNS and Configuration Settings to Resolve the Error

1. Log into cPanel
2. Check the DNS to see if the MX record is pointing to the server
   
   1. If the MX record points to the server, the email client is likely misconfigured
      1. If this is the case, move on to step 3
   2. If the MX record is not pointing here, it will need to be pointed here, or the third-party email provider will need to be contacted to investigate the error
   3. If the MX record is pointed to the domain and the domain is pointed elsewhere, the MX record should be re-configured to point to a subdomain that points here
3. Re-enter the configuration client settings into the email client
   1. To find the email settings, locate Email Accounts in cPanel
      
   2. Locate the email account and then click Connect Devices
      
      
   3. Use the information provided to connect the email account
      

      REPLACE: domain.com with the domain that is being worked on.

      1. Instead of using mail.domain.com for the incoming/outgoing servers, the hostname of the server can also be used

      2. The hostname can be found in the browser's address bar when in cPanel
         
         EXAMPLE: secure123.inmotionhosting.com or vps123.inmotionhosting.com.