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How to Setup SMTP configuration in Serv-U using Office 365

This article describes on how to Setup SMTP configuration in Serv-U using Office 365

First published date

11/6/2018 3:25 PM

Last published date

5/26/2026 4:50 PM

Overview

Serv-U application has an option to Configure an SMTP connection to send an email for events which are configured to use email actions. The Serv-U supports default port for encrypted SMTP connections is 465 and supports Implicit SSL only.

However, since Office 365 requires TLS Encryption, which is Explicit SSL/TLS (port 587) encryption only, this article describes how Office 365 SMTP Server will work in Serv-U Application.

Product section

Serv-U Managed File Transfer & Serv-U FTP Server

Cause

Serv-U does not support Explicit SSL/TLS (port 587). Some SMTP servers support Explicit SSL/TLS (port 587) encryption only. Therefore it is not possible to configure these servers in Serv-U directly.

Resolution

In order to setup the Office 365 SMTP server with TLS in Serv-U, configure your server with SMTP relay. Contact Dedicated Office 365 Administrator to SMTP relay connector.

External link for references:

How to set up a multifunction device or application to send email using Office 365 and Microsoft 365. To read more, click here.

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