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How to set up a mail server in Plesk to successfully send emails to external mail services?
Outgoing emails sent from a Plesk server to mail services like Gmail, Yahoo, Outlook go to the spam folder. How to troubleshoot and avoid it?
Note: These instruction are applicable to Plesk servers with a local mail server installed.
If after applying the steps above, emails go to spam on external mail services, visit the KB article: