In order to send emails via Elastic Email servers while using Mautic software - you will need to properly configure your Mautic.

Navigate to Email Settings under Configuration panel inside Mautic Automation Software.
To send your emails, use following settings :

Service to Send Mail Through: Other SMTP Server
SMTP Host:
SMTP Port: 2525
SMTP Encryption Type: None / SSL / TLS
SMTP Authentication Mode: Login
Username for selected email service: Use your Elastic Email API Key
Password for the selected email service: Leave empty for no change

Tip: You may need to use your API key as both your username and password.

Alternative Settings - please use these settings if your port 2525 is closed and you cannot connect via it :

SMTP Port: 25 or 465 or 587

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