SMTP recommendations if using Office365 or Outlook email accounts
Posted by Sinclair Hughes, Last modified by Sinclair Hughes on 05 March 2021 02:07 PM
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This is the link for reference on how to setup SMTP Relaying with Office 365 If they are using “Direct Send” option, it should not work for sending emails to external addresses like Gmail. Direct Send should only be used to send emails to your own Office 365 tenant. These are the direct send SMTP Settings: If you want to send emails from Office 365 to External Domains, then they must use either “Authenticated SMTP” or “SMTP Relay”. If you use “Authenticated SMTP”, then they need to make sure the account they use is not blocked to use this protocol. Places to check are:
We recommend to use “SMTP Relay” method if they want to email outside of Office 365 and these are the steps they should look into get this working properly and be trusted by external email servers:
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