Administration - Smtp Servers

Modified on Mon, 08 Jan 2024 at 04:54 PM

SMTP servers are used for sending emails to guests. 

If you would like to set up multiple SMTP servers, to send different emails from different addresses, you can use the Smtp Servers section to do this.


Click the +Add button and complete all of the fields below for each of your email addresses – you will need to ensure that these details are the exact ones that are in the Settings/Configuration area of your email client:

SMTP Server - This will be the host server i.e. 

SMTP Port - For Gmail, please use Port 465 if SSL or 587 if TLS. For Office365 please use port 587 and ensure TLS is enabled.

SMTP Username - This would be the username/email that is used for logging in to your email portal. 

SMTP Password - This is the password used for logging in to your email portal. 

Sending Email Address - This is the email address that will be used to send the emails. 

Enable SSL - Enable this if the property is using SSL on the SMTP server and ensure the correct port is being used alongside.


Please follow these steps for new office365 tenants if you are still facing connection issues with the authentication.


  1. Head to and log in with your main admin account.
  2. Once logged in please go to and click the 3 lines at the top right.
  3. Head to Azure Active Directory. 
  4. Once on this page click Properties .
  5. At the bottom click on Manage Security defaults
  6. Set this as disabled.
  7. Head back to the microsoft365 and select admin from the left-hand side.
  8. Select Multi-factor authentication.
  9. Ensure that the MFA for the SMTP account is set to Disabled.

Common troubleshooting

  • Please try a different port number.
  • Ensure the username and password are correct. (Try to log in to the email account online via the portal (Gmail/Outlook)).
  • Ensure 2FA is disabled for Office365.
  • If using Gmail as an SMTP server ensure that Less secure apps are enabled. From May 30, 2022, Google no longer supports the use of third-party apps or devices which ask you to sign in to your Google Account using only your username and password. You will need to enable 2FA on the account and use an App password. This App password is then used as the SMTP password within the SMTP settings in Hop. Details on this can be found Here
  • Ensure the Hop IP address is whitelisted.

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