Can I enable SMTP Auth without admin access?

Enabling SMTP Authentication in Microsoft 365 or Office 365 without administrative access is generally not possible, as this setting is managed at the organization or mailbox level by an administrator for security and compliance reasons.

If you require SMTP Auth for an application or integration, the most effective and quickest approach is to reach out to your IT administrator and request that it be enabled for your account. They may either grant access directly or recommend an approved and more secure alternative, such as using Microsoft Graph API or other supported email-sending methods within your organization.

Since SMTP Auth can pose security risks if not properly managed, many organizations keep it disabled by default, so working through your admin ensures both functionality and compliance with company policies.