How to Send Emails from Azure

Azure offers several options for application email delivery, but its native Azure Communication Services Email feature is described as still in public preview, subject to low default sending limits, and therefore less suited to production use. The process for using it involves creating Email Communication Service and Communication Service resources, verifying and connecting a domain, then integrating supported C#, JavaScript, Java, or Python SDKs with connection-string or Azure AD authentication to send and track messages. Because Azure restricts certain outbound SMTP traffic, particularly unauthenticated port 25 delivery, the material recommends authenticated third-party SMTP relay services using secure ports such as 587 or 443. It presents Mailtrap as one such service, available through SMTP or API integrations in applications, Azure Logic Apps, PowerShell, and Azure Function Apps, while also covering Office 365 and Gmail SMTP or connector-based alternatives. Finally, it emphasizes testing emails before production delivery with an email sandbox that can inspect content, headers, rendering, spam risks, and blacklist status.

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